20978685

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 96

約数和(自身を含む): 46126080

約数和(自身を除く): 25147395

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 47, 63, 65, 91, 105, 109, 117, 141, 195, 235, 273, 315, 327, 329, 423, 455, 545, 585, 611, 705, 763, 819, 981, 987, 1365, 1417, 1635, 1645, 1833, 2115, 2289, 2961, 3055, 3815, 4095, 4251, 4277, 4905, 4935, 5123, 5499, 6867, 7085, 9165, 9919, 11445, 12753, 12831, 14805, 15369, 21255, 21385, 25615, 27495, 29757, 34335, 35861, 38493, 46107, 49595, 63765, 64155, 66599, 76845, 89271, 107583, 148785, 179305, 192465, 199797, 230535, 322749, 332995, 446355, 466193, 537915, 599391, 998985, 1398579, 1613745, 2330965, 2996955, 4195737, 6992895, 20978685]

約数ペア:

[(1, 20978685), (3, 6992895), (5, 4195737), (7, 2996955), (9, 2330965), (13, 1613745), (15, 1398579), (21, 998985), (35, 599391), (39, 537915), (45, 466193), (47, 446355), (63, 332995), (65, 322749), (91, 230535), (105, 199797), (109, 192465), (117, 179305), (141, 148785), (195, 107583), (235, 89271), (273, 76845), (315, 66599), (327, 64155), (329, 63765), (423, 49595), (455, 46107), (545, 38493), (585, 35861), (611, 34335), (705, 29757), (763, 27495), (819, 25615), (981, 21385), (987, 21255), (1365, 15369), (1417, 14805), (1635, 12831), (1645, 12753), (1833, 11445), (2115, 9919), (2289, 9165), (2961, 7085), (3055, 6867), (3815, 5499), (4095, 5123), (4251, 4935), (4277, 4905)]