21349390

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1129}}^1$

素因数の和:1228

約数の個数: 32

約数和(自身を含む): 40354560

約数和(自身を除く): 19005170

約数列:

[1, 2, 5, 10, 31, 61, 62, 122, 155, 305, 310, 610, 1129, 1891, 2258, 3782, 5645, 9455, 11290, 18910, 34999, 68869, 69998, 137738, 174995, 344345, 349990, 688690, 2134939, 4269878, 10674695, 21349390]

約数ペア:

[(1, 21349390), (2, 10674695), (5, 4269878), (10, 2134939), (31, 688690), (61, 349990), (62, 344345), (122, 174995), (155, 137738), (305, 69998), (310, 68869), (610, 34999), (1129, 18910), (1891, 11290), (2258, 9455), (3782, 5645)]