21581560

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1$

素因数の和:67

約数の個数: 192

約数和(自身を含む): 67032000

約数和(自身を除く): 45450440

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 49, 52, 55, 56, 65, 70, 77, 88, 91, 98, 104, 110, 121, 130, 140, 143, 154, 182, 196, 220, 242, 245, 260, 280, 286, 308, 343, 364, 385, 392, 440, 455, 484, 490, 520, 539, 572, 605, 616, 637, 686, 715, 728, 770, 847, 910, 968, 980, 1001, 1078, 1144, 1210, 1274, 1372, 1430, 1540, 1573, 1694, 1715, 1820, 1960, 2002, 2156, 2420, 2548, 2695, 2744, 2860, 3080, 3146, 3185, 3388, 3430, 3640, 3773, 4004, 4235, 4312, 4459, 4840, 5005, 5096, 5390, 5720, 5929, 6292, 6370, 6776, 6860, 7007, 7546, 7865, 8008, 8470, 8918, 10010, 10780, 11011, 11858, 12584, 12740, 13720, 14014, 15092, 15730, 16940, 17836, 18865, 20020, 21560, 22022, 22295, 23716, 25480, 28028, 29645, 30184, 31460, 33880, 35035, 35672, 37730, 40040, 41503, 44044, 44590, 47432, 49049, 55055, 56056, 59290, 62920, 70070, 75460, 77077, 83006, 88088, 89180, 98098, 110110, 118580, 140140, 150920, 154154, 166012, 178360, 196196, 207515, 220220, 237160, 245245, 280280, 308308, 332024, 385385, 392392, 415030, 440440, 490490, 539539, 616616, 770770, 830060, 980980, 1079078, 1541540, 1660120, 1961960, 2158156, 2697695, 3083080, 4316312, 5395390, 10790780, 21581560]

約数ペア:

[(1, 21581560), (2, 10790780), (4, 5395390), (5, 4316312), (7, 3083080), (8, 2697695), (10, 2158156), (11, 1961960), (13, 1660120), (14, 1541540), (20, 1079078), (22, 980980), (26, 830060), (28, 770770), (35, 616616), (40, 539539), (44, 490490), (49, 440440), (52, 415030), (55, 392392), (56, 385385), (65, 332024), (70, 308308), (77, 280280), (88, 245245), (91, 237160), (98, 220220), (104, 207515), (110, 196196), (121, 178360), (130, 166012), (140, 154154), (143, 150920), (154, 140140), (182, 118580), (196, 110110), (220, 98098), (242, 89180), (245, 88088), (260, 83006), (280, 77077), (286, 75460), (308, 70070), (343, 62920), (364, 59290), (385, 56056), (392, 55055), (440, 49049), (455, 47432), (484, 44590), (490, 44044), (520, 41503), (539, 40040), (572, 37730), (605, 35672), (616, 35035), (637, 33880), (686, 31460), (715, 30184), (728, 29645), (770, 28028), (847, 25480), (910, 23716), (968, 22295), (980, 22022), (1001, 21560), (1078, 20020), (1144, 18865), (1210, 17836), (1274, 16940), (1372, 15730), (1430, 15092), (1540, 14014), (1573, 13720), (1694, 12740), (1715, 12584), (1820, 11858), (1960, 11011), (2002, 10780), (2156, 10010), (2420, 8918), (2548, 8470), (2695, 8008), (2744, 7865), (2860, 7546), (3080, 7007), (3146, 6860), (3185, 6776), (3388, 6370), (3430, 6292), (3640, 5929), (3773, 5720), (4004, 5390), (4235, 5096), (4312, 5005), (4459, 4840)]