491660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:114

約数の個数: 48

約数和(自身を含む): 1166592

約数和(自身を除く): 674932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 61, 62, 65, 122, 124, 130, 155, 244, 260, 305, 310, 403, 610, 620, 793, 806, 1220, 1586, 1612, 1891, 2015, 3172, 3782, 3965, 4030, 7564, 7930, 8060, 9455, 15860, 18910, 24583, 37820, 49166, 98332, 122915, 245830, 491660]

約数ペア:

[(1, 491660), (2, 245830), (4, 122915), (5, 98332), (10, 49166), (13, 37820), (20, 24583), (26, 18910), (31, 15860), (52, 9455), (61, 8060), (62, 7930), (65, 7564), (122, 4030), (124, 3965), (130, 3782), (155, 3172), (244, 2015), (260, 1891), (305, 1612), (310, 1586), (403, 1220), (610, 806), (620, 793)]