18428680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{661}}^1$

素因数の和:730

約数の個数: 64

約数和(自身を含む): 45042480

約数和(自身を除く): 26613800

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 68, 82, 85, 136, 164, 170, 205, 328, 340, 410, 661, 680, 697, 820, 1322, 1394, 1640, 2644, 2788, 3305, 3485, 5288, 5576, 6610, 6970, 11237, 13220, 13940, 22474, 26440, 27101, 27880, 44948, 54202, 56185, 89896, 108404, 112370, 135505, 216808, 224740, 271010, 449480, 460717, 542020, 921434, 1084040, 1842868, 2303585, 3685736, 4607170, 9214340, 18428680]

約数ペア:

[(1, 18428680), (2, 9214340), (4, 4607170), (5, 3685736), (8, 2303585), (10, 1842868), (17, 1084040), (20, 921434), (34, 542020), (40, 460717), (41, 449480), (68, 271010), (82, 224740), (85, 216808), (136, 135505), (164, 112370), (170, 108404), (205, 89896), (328, 56185), (340, 54202), (410, 44948), (661, 27880), (680, 27101), (697, 26440), (820, 22474), (1322, 13940), (1394, 13220), (1640, 11237), (2644, 6970), (2788, 6610), (3305, 5576), (3485, 5288)]