2155780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 5080320

約数和(自身を除く): 2924540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 239, 410, 451, 478, 820, 902, 956, 1195, 1804, 2255, 2390, 2629, 4510, 4780, 5258, 9020, 9799, 10516, 13145, 19598, 26290, 39196, 48995, 52580, 97990, 107789, 195980, 215578, 431156, 538945, 1077890, 2155780]

約数ペア:

[(1, 2155780), (2, 1077890), (4, 538945), (5, 431156), (10, 215578), (11, 195980), (20, 107789), (22, 97990), (41, 52580), (44, 48995), (55, 39196), (82, 26290), (110, 19598), (164, 13145), (205, 10516), (220, 9799), (239, 9020), (410, 5258), (451, 4780), (478, 4510), (820, 2629), (902, 2390), (956, 2255), (1195, 1804)]