21871040

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1667}}^1$

素因数の和:1725

約数の個数: 56

約数和(自身を含む): 53382672

約数和(自身を除く): 31511632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1640, 1667, 2624, 3280, 3334, 6560, 6668, 8335, 13120, 13336, 16670, 26672, 33340, 53344, 66680, 68347, 106688, 133360, 136694, 266720, 273388, 341735, 533440, 546776, 683470, 1093552, 1366940, 2187104, 2733880, 4374208, 5467760, 10935520, 21871040]

約数ペア:

[(1, 21871040), (2, 10935520), (4, 5467760), (5, 4374208), (8, 2733880), (10, 2187104), (16, 1366940), (20, 1093552), (32, 683470), (40, 546776), (41, 533440), (64, 341735), (80, 273388), (82, 266720), (160, 136694), (164, 133360), (205, 106688), (320, 68347), (328, 66680), (410, 53344), (656, 33340), (820, 26672), (1312, 16670), (1640, 13336), (1667, 13120), (2624, 8335), (3280, 6668), (3334, 6560)]