21651660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3251}}^1$

素因数の和:3303

約数の個数: 72

約数和(自身を含む): 67472496

約数和(自身を除く): 45820836

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3251, 3330, 6502, 6660, 9753, 13004, 16255, 19506, 29259, 32510, 39012, 48765, 58518, 65020, 97530, 117036, 120287, 146295, 195060, 240574, 292590, 360861, 481148, 585180, 601435, 721722, 1082583, 1202870, 1443444, 1804305, 2165166, 2405740, 3608610, 4330332, 5412915, 7217220, 10825830, 21651660]

約数ペア:

[(1, 21651660), (2, 10825830), (3, 7217220), (4, 5412915), (5, 4330332), (6, 3608610), (9, 2405740), (10, 2165166), (12, 1804305), (15, 1443444), (18, 1202870), (20, 1082583), (30, 721722), (36, 601435), (37, 585180), (45, 481148), (60, 360861), (74, 292590), (90, 240574), (111, 195060), (148, 146295), (180, 120287), (185, 117036), (222, 97530), (333, 65020), (370, 58518), (444, 48765), (555, 39012), (666, 32510), (740, 29259), (1110, 19506), (1332, 16255), (1665, 13004), (2220, 9753), (3251, 6660), (3330, 6502)]