399880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{769}}^1$

素因数の和:793

約数の個数: 32

約数和(自身を含む): 970200

約数和(自身を除く): 570320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 769, 1538, 3076, 3845, 6152, 7690, 9997, 15380, 19994, 30760, 39988, 49985, 79976, 99970, 199940, 399880]

約数ペア:

[(1, 399880), (2, 199940), (4, 99970), (5, 79976), (8, 49985), (10, 39988), (13, 30760), (20, 19994), (26, 15380), (40, 9997), (52, 7690), (65, 6152), (104, 3845), (130, 3076), (260, 1538), (520, 769)]