18405640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{709}}^1$

素因数の和:790

約数の個数: 64

約数和(自身を含む): 46008000

約数和(自身を除く): 27602360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 59, 88, 110, 118, 220, 236, 295, 440, 472, 590, 649, 709, 1180, 1298, 1418, 2360, 2596, 2836, 3245, 3545, 5192, 5672, 6490, 7090, 7799, 12980, 14180, 15598, 25960, 28360, 31196, 38995, 41831, 62392, 77990, 83662, 155980, 167324, 209155, 311960, 334648, 418310, 460141, 836620, 920282, 1673240, 1840564, 2300705, 3681128, 4601410, 9202820, 18405640]

約数ペア:

[(1, 18405640), (2, 9202820), (4, 4601410), (5, 3681128), (8, 2300705), (10, 1840564), (11, 1673240), (20, 920282), (22, 836620), (40, 460141), (44, 418310), (55, 334648), (59, 311960), (88, 209155), (110, 167324), (118, 155980), (220, 83662), (236, 77990), (295, 62392), (440, 41831), (472, 38995), (590, 31196), (649, 28360), (709, 25960), (1180, 15598), (1298, 14180), (1418, 12980), (2360, 7799), (2596, 7090), (2836, 6490), (3245, 5672), (3545, 5192)]