31771240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{449}}^1$

素因数の和:550

約数の個数: 64

約数和(自身を含む): 75330000

約数和(自身を除く): 43558760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 61, 116, 122, 145, 232, 244, 290, 305, 449, 488, 580, 610, 898, 1160, 1220, 1769, 1796, 2245, 2440, 3538, 3592, 4490, 7076, 8845, 8980, 13021, 14152, 17690, 17960, 26042, 27389, 35380, 52084, 54778, 65105, 70760, 104168, 109556, 130210, 136945, 219112, 260420, 273890, 520840, 547780, 794281, 1095560, 1588562, 3177124, 3971405, 6354248, 7942810, 15885620, 31771240]

約数ペア:

[(1, 31771240), (2, 15885620), (4, 7942810), (5, 6354248), (8, 3971405), (10, 3177124), (20, 1588562), (29, 1095560), (40, 794281), (58, 547780), (61, 520840), (116, 273890), (122, 260420), (145, 219112), (232, 136945), (244, 130210), (290, 109556), (305, 104168), (449, 70760), (488, 65105), (580, 54778), (610, 52084), (898, 35380), (1160, 27389), (1220, 26042), (1769, 17960), (1796, 17690), (2245, 14152), (2440, 13021), (3538, 8980), (3592, 8845), (4490, 7076)]