21403850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{149}}^1$

素因数の和:204

約数の個数: 72

約数和(自身を含む): 45951300

約数和(自身を除く): 24547450

約数列:

[1, 2, 5, 10, 13, 17, 25, 26, 34, 50, 65, 85, 130, 149, 169, 170, 221, 298, 325, 338, 425, 442, 650, 745, 845, 850, 1105, 1490, 1690, 1937, 2210, 2533, 2873, 3725, 3874, 4225, 5066, 5525, 5746, 7450, 8450, 9685, 11050, 12665, 14365, 19370, 25181, 25330, 28730, 32929, 48425, 50362, 63325, 65858, 71825, 96850, 125905, 126650, 143650, 164645, 251810, 329290, 428077, 629525, 823225, 856154, 1259050, 1646450, 2140385, 4280770, 10701925, 21403850]

約数ペア:

[(1, 21403850), (2, 10701925), (5, 4280770), (10, 2140385), (13, 1646450), (17, 1259050), (25, 856154), (26, 823225), (34, 629525), (50, 428077), (65, 329290), (85, 251810), (130, 164645), (149, 143650), (169, 126650), (170, 125905), (221, 96850), (298, 71825), (325, 65858), (338, 63325), (425, 50362), (442, 48425), (650, 32929), (745, 28730), (845, 25330), (850, 25181), (1105, 19370), (1490, 14365), (1690, 12665), (1937, 11050), (2210, 9685), (2533, 8450), (2873, 7450), (3725, 5746), (3874, 5525), (4225, 5066)]