20505760

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:278

約数の個数: 96

約数和(自身を含む): 53996544

約数和(自身を除く): 33490784

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 61, 80, 88, 110, 122, 160, 176, 191, 220, 244, 305, 352, 382, 440, 488, 610, 671, 764, 880, 955, 976, 1220, 1342, 1528, 1760, 1910, 1952, 2101, 2440, 2684, 3056, 3355, 3820, 4202, 4880, 5368, 6112, 6710, 7640, 8404, 9760, 10505, 10736, 11651, 13420, 15280, 16808, 21010, 21472, 23302, 26840, 30560, 33616, 42020, 46604, 53680, 58255, 67232, 84040, 93208, 107360, 116510, 128161, 168080, 186416, 233020, 256322, 336160, 372832, 466040, 512644, 640805, 932080, 1025288, 1281610, 1864160, 2050576, 2563220, 4101152, 5126440, 10252880, 20505760]

約数ペア:

[(1, 20505760), (2, 10252880), (4, 5126440), (5, 4101152), (8, 2563220), (10, 2050576), (11, 1864160), (16, 1281610), (20, 1025288), (22, 932080), (32, 640805), (40, 512644), (44, 466040), (55, 372832), (61, 336160), (80, 256322), (88, 233020), (110, 186416), (122, 168080), (160, 128161), (176, 116510), (191, 107360), (220, 93208), (244, 84040), (305, 67232), (352, 58255), (382, 53680), (440, 46604), (488, 42020), (610, 33616), (671, 30560), (764, 26840), (880, 23302), (955, 21472), (976, 21010), (1220, 16808), (1342, 15280), (1528, 13420), (1760, 11651), (1910, 10736), (1952, 10505), (2101, 9760), (2440, 8404), (2684, 7640), (3056, 6710), (3355, 6112), (3820, 5368), (4202, 4880)]