18019580

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{911}}^1$

素因数の和:986

約数の個数: 48

約数和(自身を含む): 40449024

約数和(自身を除く): 22429444

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 911, 989, 1822, 1978, 3644, 3956, 4555, 4945, 9110, 9890, 18220, 19780, 20953, 39173, 41906, 78346, 83812, 104765, 156692, 195865, 209530, 391730, 419060, 783460, 900979, 1801958, 3603916, 4504895, 9009790, 18019580]

約数ペア:

[(1, 18019580), (2, 9009790), (4, 4504895), (5, 3603916), (10, 1801958), (20, 900979), (23, 783460), (43, 419060), (46, 391730), (86, 209530), (92, 195865), (115, 156692), (172, 104765), (215, 83812), (230, 78346), (430, 41906), (460, 39173), (860, 20953), (911, 19780), (989, 18220), (1822, 9890), (1978, 9110), (3644, 4945), (3956, 4555)]