21013360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15451}}^1$

素因数の和:15481

約数の個数: 40

約数和(自身を含む): 51733296

約数和(自身を除く): 30719936

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15451, 30902, 61804, 77255, 123608, 154510, 247216, 262667, 309020, 525334, 618040, 1050668, 1236080, 1313335, 2101336, 2626670, 4202672, 5253340, 10506680, 21013360]

約数ペア:

[(1, 21013360), (2, 10506680), (4, 5253340), (5, 4202672), (8, 2626670), (10, 2101336), (16, 1313335), (17, 1236080), (20, 1050668), (34, 618040), (40, 525334), (68, 309020), (80, 262667), (85, 247216), (136, 154510), (170, 123608), (272, 77255), (340, 61804), (680, 30902), (1360, 15451)]