18901000

素因数分解:

$2^3\times 5^3\times {\mathrm{41}}^1\times {\mathrm{461}}^1$

素因数の和:523

約数の個数: 64

約数和(自身を含む): 45405360

約数和(自身を除く): 26504360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 328, 410, 461, 500, 820, 922, 1000, 1025, 1640, 1844, 2050, 2305, 3688, 4100, 4610, 5125, 8200, 9220, 10250, 11525, 18440, 18901, 20500, 23050, 37802, 41000, 46100, 57625, 75604, 92200, 94505, 115250, 151208, 189010, 230500, 378020, 461000, 472525, 756040, 945050, 1890100, 2362625, 3780200, 4725250, 9450500, 18901000]

約数ペア:

[(1, 18901000), (2, 9450500), (4, 4725250), (5, 3780200), (8, 2362625), (10, 1890100), (20, 945050), (25, 756040), (40, 472525), (41, 461000), (50, 378020), (82, 230500), (100, 189010), (125, 151208), (164, 115250), (200, 94505), (205, 92200), (250, 75604), (328, 57625), (410, 46100), (461, 41000), (500, 37802), (820, 23050), (922, 20500), (1000, 18901), (1025, 18440), (1640, 11525), (1844, 10250), (2050, 9220), (2305, 8200), (3688, 5125), (4100, 4610)]