18131840

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{691}}^1$

素因数の和:751

約数の個数: 64

約数和(自身を含む): 44467920

約数和(自身を除く): 26336080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 691, 820, 1312, 1382, 1640, 2624, 2764, 3280, 3455, 5248, 5528, 6560, 6910, 11056, 13120, 13820, 22112, 26240, 27640, 28331, 44224, 55280, 56662, 88448, 110560, 113324, 141655, 221120, 226648, 283310, 442240, 453296, 566620, 906592, 1133240, 1813184, 2266480, 3626368, 4532960, 9065920, 18131840]

約数ペア:

[(1, 18131840), (2, 9065920), (4, 4532960), (5, 3626368), (8, 2266480), (10, 1813184), (16, 1133240), (20, 906592), (32, 566620), (40, 453296), (41, 442240), (64, 283310), (80, 226648), (82, 221120), (128, 141655), (160, 113324), (164, 110560), (205, 88448), (320, 56662), (328, 55280), (410, 44224), (640, 28331), (656, 27640), (691, 26240), (820, 22112), (1312, 13820), (1382, 13120), (1640, 11056), (2624, 6910), (2764, 6560), (3280, 5528), (3455, 5248)]