21891915

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 39525408

約数和(自身を除く): 17633493

約数列:

[1, 3, 5, 9, 15, 45, 53, 67, 137, 159, 201, 265, 335, 411, 477, 603, 685, 795, 1005, 1233, 2055, 2385, 3015, 3551, 6165, 7261, 9179, 10653, 17755, 21783, 27537, 31959, 36305, 45895, 53265, 65349, 82611, 108915, 137685, 159795, 326745, 413055, 486487, 1459461, 2432435, 4378383, 7297305, 21891915]

約数ペア:

[(1, 21891915), (3, 7297305), (5, 4378383), (9, 2432435), (15, 1459461), (45, 486487), (53, 413055), (67, 326745), (137, 159795), (159, 137685), (201, 108915), (265, 82611), (335, 65349), (411, 53265), (477, 45895), (603, 36305), (685, 31959), (795, 27537), (1005, 21783), (1233, 17755), (2055, 10653), (2385, 9179), (3015, 7261), (3551, 6165)]