420640

素因数分解:

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

素因数の和:265

約数の個数: 48

約数和(自身を含む): 1088640

約数和(自身を除く): 668000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 239, 352, 440, 478, 880, 956, 1195, 1760, 1912, 2390, 2629, 3824, 4780, 5258, 7648, 9560, 10516, 13145, 19120, 21032, 26290, 38240, 42064, 52580, 84128, 105160, 210320, 420640]

約数ペア:

[(1, 420640), (2, 210320), (4, 105160), (5, 84128), (8, 52580), (10, 42064), (11, 38240), (16, 26290), (20, 21032), (22, 19120), (32, 13145), (40, 10516), (44, 9560), (55, 7648), (80, 5258), (88, 4780), (110, 3824), (160, 2629), (176, 2390), (220, 1912), (239, 1760), (352, 1195), (440, 956), (478, 880)]