19615640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{409}}^1$

素因数の和:540

約数の個数: 64

約数和(自身を含む): 48708000

約数和(自身を除く): 29092360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 109, 110, 218, 220, 409, 436, 440, 545, 818, 872, 1090, 1199, 1636, 2045, 2180, 2398, 3272, 4090, 4360, 4499, 4796, 5995, 8180, 8998, 9592, 11990, 16360, 17996, 22495, 23980, 35992, 44581, 44990, 47960, 89162, 89980, 178324, 179960, 222905, 356648, 445810, 490391, 891620, 980782, 1783240, 1961564, 2451955, 3923128, 4903910, 9807820, 19615640]

約数ペア:

[(1, 19615640), (2, 9807820), (4, 4903910), (5, 3923128), (8, 2451955), (10, 1961564), (11, 1783240), (20, 980782), (22, 891620), (40, 490391), (44, 445810), (55, 356648), (88, 222905), (109, 179960), (110, 178324), (218, 89980), (220, 89162), (409, 47960), (436, 44990), (440, 44581), (545, 35992), (818, 23980), (872, 22495), (1090, 17996), (1199, 16360), (1636, 11990), (2045, 9592), (2180, 8998), (2398, 8180), (3272, 5995), (4090, 4796), (4360, 4499)]