21891420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:244

約数の個数: 144

約数和(自身を含む): 72203040

約数和(自身を除く): 50311620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 37, 38, 45, 57, 60, 74, 76, 90, 95, 111, 114, 148, 171, 173, 180, 185, 190, 222, 228, 285, 333, 342, 346, 370, 380, 444, 519, 555, 570, 666, 684, 692, 703, 740, 855, 865, 1038, 1110, 1140, 1332, 1406, 1557, 1665, 1710, 1730, 2076, 2109, 2220, 2595, 2812, 3114, 3287, 3330, 3420, 3460, 3515, 4218, 5190, 6228, 6327, 6401, 6574, 6660, 7030, 7785, 8436, 9861, 10380, 10545, 12654, 12802, 13148, 14060, 15570, 16435, 19203, 19722, 21090, 25308, 25604, 29583, 31140, 31635, 32005, 32870, 38406, 39444, 42180, 49305, 57609, 59166, 63270, 64010, 65740, 76812, 96015, 98610, 115218, 118332, 121619, 126540, 128020, 147915, 192030, 197220, 230436, 243238, 288045, 295830, 364857, 384060, 486476, 576090, 591660, 608095, 729714, 1094571, 1152180, 1216190, 1459428, 1824285, 2189142, 2432380, 3648570, 4378284, 5472855, 7297140, 10945710, 21891420]

約数ペア:

[(1, 21891420), (2, 10945710), (3, 7297140), (4, 5472855), (5, 4378284), (6, 3648570), (9, 2432380), (10, 2189142), (12, 1824285), (15, 1459428), (18, 1216190), (19, 1152180), (20, 1094571), (30, 729714), (36, 608095), (37, 591660), (38, 576090), (45, 486476), (57, 384060), (60, 364857), (74, 295830), (76, 288045), (90, 243238), (95, 230436), (111, 197220), (114, 192030), (148, 147915), (171, 128020), (173, 126540), (180, 121619), (185, 118332), (190, 115218), (222, 98610), (228, 96015), (285, 76812), (333, 65740), (342, 64010), (346, 63270), (370, 59166), (380, 57609), (444, 49305), (519, 42180), (555, 39444), (570, 38406), (666, 32870), (684, 32005), (692, 31635), (703, 31140), (740, 29583), (855, 25604), (865, 25308), (1038, 21090), (1110, 19722), (1140, 19203), (1332, 16435), (1406, 15570), (1557, 14060), (1665, 13148), (1710, 12802), (1730, 12654), (2076, 10545), (2109, 10380), (2220, 9861), (2595, 8436), (2812, 7785), (3114, 7030), (3287, 6660), (3330, 6574), (3420, 6401), (3460, 6327), (3515, 6228), (4218, 5190)]