21261370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{3989}}^1$

素因数の和:4050

約数の個数: 32

約数和(自身を含む): 42230160

約数和(自身を除く): 20968790

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 130, 205, 410, 533, 1066, 2665, 3989, 5330, 7978, 19945, 39890, 51857, 103714, 163549, 259285, 327098, 518570, 817745, 1635490, 2126137, 4252274, 10630685, 21261370]

約数ペア:

[(1, 21261370), (2, 10630685), (5, 4252274), (10, 2126137), (13, 1635490), (26, 817745), (41, 518570), (65, 327098), (82, 259285), (130, 163549), (205, 103714), (410, 51857), (533, 39890), (1066, 19945), (2665, 7978), (3989, 5330)]