22001980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:204

約数の個数: 144

約数和(自身を含む): 63546336

約数和(自身を除く): 41544356

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 49, 52, 55, 65, 70, 77, 91, 98, 110, 130, 140, 143, 154, 157, 182, 196, 220, 245, 260, 286, 308, 314, 364, 385, 455, 490, 539, 572, 628, 637, 715, 770, 785, 910, 980, 1001, 1078, 1099, 1274, 1430, 1540, 1570, 1727, 1820, 2002, 2041, 2156, 2198, 2548, 2695, 2860, 3140, 3185, 3454, 4004, 4082, 4396, 5005, 5390, 5495, 6370, 6908, 7007, 7693, 8164, 8635, 10010, 10205, 10780, 10990, 12089, 12740, 14014, 14287, 15386, 17270, 20020, 20410, 21980, 22451, 24178, 28028, 28574, 30772, 34540, 35035, 38465, 40820, 44902, 48356, 57148, 60445, 70070, 71435, 76930, 84623, 89804, 100009, 112255, 120890, 140140, 142870, 153860, 157157, 169246, 200018, 224510, 241780, 285740, 314314, 338492, 400036, 423115, 449020, 500045, 628628, 785785, 846230, 1000090, 1100099, 1571570, 1692460, 2000180, 2200198, 3143140, 4400396, 5500495, 11000990, 22001980]

約数ペア:

[(1, 22001980), (2, 11000990), (4, 5500495), (5, 4400396), (7, 3143140), (10, 2200198), (11, 2000180), (13, 1692460), (14, 1571570), (20, 1100099), (22, 1000090), (26, 846230), (28, 785785), (35, 628628), (44, 500045), (49, 449020), (52, 423115), (55, 400036), (65, 338492), (70, 314314), (77, 285740), (91, 241780), (98, 224510), (110, 200018), (130, 169246), (140, 157157), (143, 153860), (154, 142870), (157, 140140), (182, 120890), (196, 112255), (220, 100009), (245, 89804), (260, 84623), (286, 76930), (308, 71435), (314, 70070), (364, 60445), (385, 57148), (455, 48356), (490, 44902), (539, 40820), (572, 38465), (628, 35035), (637, 34540), (715, 30772), (770, 28574), (785, 28028), (910, 24178), (980, 22451), (1001, 21980), (1078, 20410), (1099, 20020), (1274, 17270), (1430, 15386), (1540, 14287), (1570, 14014), (1727, 12740), (1820, 12089), (2002, 10990), (2041, 10780), (2156, 10205), (2198, 10010), (2548, 8635), (2695, 8164), (2860, 7693), (3140, 7007), (3185, 6908), (3454, 6370), (4004, 5495), (4082, 5390), (4396, 5005)]