21401900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{163}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 50819664

約数和(自身を除く): 29417764

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 101, 130, 163, 202, 260, 325, 326, 404, 505, 650, 652, 815, 1010, 1300, 1313, 1630, 2020, 2119, 2525, 2626, 3260, 4075, 4238, 5050, 5252, 6565, 8150, 8476, 10100, 10595, 13130, 16300, 16463, 21190, 26260, 32825, 32926, 42380, 52975, 65650, 65852, 82315, 105950, 131300, 164630, 211900, 214019, 329260, 411575, 428038, 823150, 856076, 1070095, 1646300, 2140190, 4280380, 5350475, 10700950, 21401900]

約数ペア:

[(1, 21401900), (2, 10700950), (4, 5350475), (5, 4280380), (10, 2140190), (13, 1646300), (20, 1070095), (25, 856076), (26, 823150), (50, 428038), (52, 411575), (65, 329260), (100, 214019), (101, 211900), (130, 164630), (163, 131300), (202, 105950), (260, 82315), (325, 65852), (326, 65650), (404, 52975), (505, 42380), (650, 32926), (652, 32825), (815, 26260), (1010, 21190), (1300, 16463), (1313, 16300), (1630, 13130), (2020, 10595), (2119, 10100), (2525, 8476), (2626, 8150), (3260, 6565), (4075, 5252), (4238, 5050)]