412880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1$

素因数の和:423

約数の個数: 40

約数和(自身を含む): 1036392

約数和(自身を除く): 623512

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 397, 520, 794, 1040, 1588, 1985, 3176, 3970, 5161, 6352, 7940, 10322, 15880, 20644, 25805, 31760, 41288, 51610, 82576, 103220, 206440, 412880]

約数ペア:

[(1, 412880), (2, 206440), (4, 103220), (5, 82576), (8, 51610), (10, 41288), (13, 31760), (16, 25805), (20, 20644), (26, 15880), (40, 10322), (52, 7940), (65, 6352), (80, 5161), (104, 3970), (130, 3176), (208, 1985), (260, 1588), (397, 1040), (520, 794)]