18717680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13763}}^1$

素因数の和:13793

約数の個数: 40

約数和(自身を含む): 46081872

約数和(自身を除く): 27364192

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13763, 27526, 55052, 68815, 110104, 137630, 220208, 233971, 275260, 467942, 550520, 935884, 1101040, 1169855, 1871768, 2339710, 3743536, 4679420, 9358840, 18717680]

約数ペア:

[(1, 18717680), (2, 9358840), (4, 4679420), (5, 3743536), (8, 2339710), (10, 1871768), (16, 1169855), (17, 1101040), (20, 935884), (34, 550520), (40, 467942), (68, 275260), (80, 233971), (85, 220208), (136, 137630), (170, 110104), (272, 68815), (340, 55052), (680, 27526), (1360, 13763)]