81300440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156347}}^1$

素因数の和:156371

約数の個数: 32

約数和(自身を含む): 196998480

約数和(自身を除く): 115698040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156347, 312694, 625388, 781735, 1250776, 1563470, 2032511, 3126940, 4065022, 6253880, 8130044, 10162555, 16260088, 20325110, 40650220, 81300440]

約数ペア:

[(1, 81300440), (2, 40650220), (4, 20325110), (5, 16260088), (8, 10162555), (10, 8130044), (13, 6253880), (20, 4065022), (26, 3126940), (40, 2032511), (52, 1563470), (65, 1250776), (104, 781735), (130, 625388), (260, 312694), (520, 156347)]