21642495

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 41902080

約数和(自身を除く): 20259585

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 61, 93, 105, 109, 155, 183, 217, 305, 327, 427, 465, 545, 651, 763, 915, 1085, 1281, 1635, 1891, 2135, 2289, 3255, 3379, 3815, 5673, 6405, 6649, 9455, 10137, 11445, 13237, 16895, 19947, 23653, 28365, 33245, 39711, 46543, 50685, 66185, 70959, 99735, 118265, 139629, 198555, 206119, 232715, 354795, 618357, 698145, 1030595, 1442833, 3091785, 4328499, 7214165, 21642495]

約数ペア:

[(1, 21642495), (3, 7214165), (5, 4328499), (7, 3091785), (15, 1442833), (21, 1030595), (31, 698145), (35, 618357), (61, 354795), (93, 232715), (105, 206119), (109, 198555), (155, 139629), (183, 118265), (217, 99735), (305, 70959), (327, 66185), (427, 50685), (465, 46543), (545, 39711), (651, 33245), (763, 28365), (915, 23653), (1085, 19947), (1281, 16895), (1635, 13237), (1891, 11445), (2135, 10137), (2289, 9455), (3255, 6649), (3379, 6405), (3815, 5673)]