20880585

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 80

約数和(自身を含む): 42166080

約数和(自身を除く): 21285495

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 43, 45, 55, 81, 99, 109, 129, 135, 165, 215, 297, 327, 387, 405, 473, 495, 545, 645, 891, 981, 1161, 1199, 1419, 1485, 1635, 1935, 2365, 2943, 3483, 3597, 4257, 4455, 4687, 4905, 5805, 5995, 7095, 8829, 10791, 12771, 14061, 14715, 17415, 17985, 21285, 23435, 32373, 38313, 42183, 44145, 51557, 53955, 63855, 70305, 97119, 126549, 154671, 161865, 191565, 210915, 257785, 379647, 464013, 485595, 632745, 773355, 1392039, 1898235, 2320065, 4176117, 6960195, 20880585]

約数ペア:

[(1, 20880585), (3, 6960195), (5, 4176117), (9, 2320065), (11, 1898235), (15, 1392039), (27, 773355), (33, 632745), (43, 485595), (45, 464013), (55, 379647), (81, 257785), (99, 210915), (109, 191565), (129, 161865), (135, 154671), (165, 126549), (215, 97119), (297, 70305), (327, 63855), (387, 53955), (405, 51557), (473, 44145), (495, 42183), (545, 38313), (645, 32373), (891, 23435), (981, 21285), (1161, 17985), (1199, 17415), (1419, 14715), (1485, 14061), (1635, 12771), (1935, 10791), (2365, 8829), (2943, 7095), (3483, 5995), (3597, 5805), (4257, 4905), (4455, 4687)]