20997840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87491}}^1$

素因数の和:87507

約数の個数: 40

約数和(自身を含む): 65094048

約数和(自身を除く): 44096208

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87491, 174982, 262473, 349964, 437455, 524946, 699928, 874910, 1049892, 1312365, 1399856, 1749820, 2099784, 2624730, 3499640, 4199568, 5249460, 6999280, 10498920, 20997840]

約数ペア:

[(1, 20997840), (2, 10498920), (3, 6999280), (4, 5249460), (5, 4199568), (6, 3499640), (8, 2624730), (10, 2099784), (12, 1749820), (15, 1399856), (16, 1312365), (20, 1049892), (24, 874910), (30, 699928), (40, 524946), (48, 437455), (60, 349964), (80, 262473), (120, 174982), (240, 87491)]