18495920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5639}}^1$

素因数の和:5693

約数の個数: 40

約数和(自身を含む): 44059680

約数和(自身を除く): 25563760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5639, 11278, 22556, 28195, 45112, 56390, 90224, 112780, 225560, 231199, 451120, 462398, 924796, 1155995, 1849592, 2311990, 3699184, 4623980, 9247960, 18495920]

約数ペア:

[(1, 18495920), (2, 9247960), (4, 4623980), (5, 3699184), (8, 2311990), (10, 1849592), (16, 1155995), (20, 924796), (40, 462398), (41, 451120), (80, 231199), (82, 225560), (164, 112780), (205, 90224), (328, 56390), (410, 45112), (656, 28195), (820, 22556), (1640, 11278), (3280, 5639)]