21910005

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 42707808

約数和(自身を除く): 20797803

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 67, 117, 129, 169, 195, 201, 215, 335, 387, 507, 559, 585, 603, 645, 845, 871, 1005, 1521, 1677, 1935, 2535, 2613, 2795, 2881, 3015, 4355, 5031, 7267, 7605, 7839, 8385, 8643, 11323, 13065, 14405, 21801, 25155, 25929, 33969, 36335, 37453, 39195, 43215, 56615, 65403, 101907, 109005, 112359, 129645, 169845, 187265, 327015, 337077, 486889, 509535, 561795, 1460667, 1685385, 2434445, 4382001, 7303335, 21910005]

約数ペア:

[(1, 21910005), (3, 7303335), (5, 4382001), (9, 2434445), (13, 1685385), (15, 1460667), (39, 561795), (43, 509535), (45, 486889), (65, 337077), (67, 327015), (117, 187265), (129, 169845), (169, 129645), (195, 112359), (201, 109005), (215, 101907), (335, 65403), (387, 56615), (507, 43215), (559, 39195), (585, 37453), (603, 36335), (645, 33969), (845, 25929), (871, 25155), (1005, 21801), (1521, 14405), (1677, 13065), (1935, 11323), (2535, 8643), (2613, 8385), (2795, 7839), (2881, 7605), (3015, 7267), (4355, 5031)]