18376720

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^2$

素因数の和:220

約数の個数: 60

約数和(自身を含む): 44701380

約数和(自身を除く): 26324660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 89, 116, 145, 178, 232, 290, 356, 445, 464, 580, 712, 890, 1160, 1424, 1780, 2320, 2581, 3560, 5162, 7120, 7921, 10324, 12905, 15842, 20648, 25810, 31684, 39605, 41296, 51620, 63368, 79210, 103240, 126736, 158420, 206480, 229709, 316840, 459418, 633680, 918836, 1148545, 1837672, 2297090, 3675344, 4594180, 9188360, 18376720]

約数ペア:

[(1, 18376720), (2, 9188360), (4, 4594180), (5, 3675344), (8, 2297090), (10, 1837672), (16, 1148545), (20, 918836), (29, 633680), (40, 459418), (58, 316840), (80, 229709), (89, 206480), (116, 158420), (145, 126736), (178, 103240), (232, 79210), (290, 63368), (356, 51620), (445, 41296), (464, 39605), (580, 31684), (712, 25810), (890, 20648), (1160, 15842), (1424, 12905), (1780, 10324), (2320, 7921), (2581, 7120), (3560, 5162)]