21369660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27397}}^1$

素因数の和:27422

約数の個数: 48

約数和(自身を含む): 64440096

約数和(自身を除く): 43070436

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27397, 54794, 82191, 109588, 136985, 164382, 273970, 328764, 356161, 410955, 547940, 712322, 821910, 1068483, 1424644, 1643820, 1780805, 2136966, 3561610, 4273932, 5342415, 7123220, 10684830, 21369660]

約数ペア:

[(1, 21369660), (2, 10684830), (3, 7123220), (4, 5342415), (5, 4273932), (6, 3561610), (10, 2136966), (12, 1780805), (13, 1643820), (15, 1424644), (20, 1068483), (26, 821910), (30, 712322), (39, 547940), (52, 410955), (60, 356161), (65, 328764), (78, 273970), (130, 164382), (156, 136985), (195, 109588), (260, 82191), (390, 54794), (780, 27397)]