20195780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2239}}^1$

素因数の和:2300

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 27220540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2239, 2255, 4478, 4510, 8956, 9020, 11195, 22390, 24629, 44780, 49258, 91799, 98516, 123145, 183598, 246290, 367196, 458995, 492580, 917990, 1009789, 1835980, 2019578, 4039156, 5048945, 10097890, 20195780]

約数ペア:

[(1, 20195780), (2, 10097890), (4, 5048945), (5, 4039156), (10, 2019578), (11, 1835980), (20, 1009789), (22, 917990), (41, 492580), (44, 458995), (55, 367196), (82, 246290), (110, 183598), (164, 123145), (205, 98516), (220, 91799), (410, 49258), (451, 44780), (820, 24629), (902, 22390), (1804, 11195), (2239, 9020), (2255, 8956), (4478, 4510)]