21145140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1487}}^1$

素因数の和:1581

約数の個数: 72

約数和(自身を含む): 64995840

約数和(自身を除く): 43850700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 79, 90, 158, 180, 237, 316, 395, 474, 711, 790, 948, 1185, 1422, 1487, 1580, 2370, 2844, 2974, 3555, 4461, 4740, 5948, 7110, 7435, 8922, 13383, 14220, 14870, 17844, 22305, 26766, 29740, 44610, 53532, 66915, 89220, 117473, 133830, 234946, 267660, 352419, 469892, 587365, 704838, 1057257, 1174730, 1409676, 1762095, 2114514, 2349460, 3524190, 4229028, 5286285, 7048380, 10572570, 21145140]

約数ペア:

[(1, 21145140), (2, 10572570), (3, 7048380), (4, 5286285), (5, 4229028), (6, 3524190), (9, 2349460), (10, 2114514), (12, 1762095), (15, 1409676), (18, 1174730), (20, 1057257), (30, 704838), (36, 587365), (45, 469892), (60, 352419), (79, 267660), (90, 234946), (158, 133830), (180, 117473), (237, 89220), (316, 66915), (395, 53532), (474, 44610), (711, 29740), (790, 26766), (948, 22305), (1185, 17844), (1422, 14870), (1487, 14220), (1580, 13383), (2370, 8922), (2844, 7435), (2974, 7110), (3555, 5948), (4461, 4740)]