18704080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{809}}^1$

素因数の和:856

約数の個数: 60

約数和(自身を含む): 46252620

約数和(自身を除く): 27548540

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 809, 1156, 1360, 1445, 1618, 2312, 2890, 3236, 4045, 4624, 5780, 6472, 8090, 11560, 12944, 13753, 16180, 23120, 27506, 32360, 55012, 64720, 68765, 110024, 137530, 220048, 233801, 275060, 467602, 550120, 935204, 1100240, 1169005, 1870408, 2338010, 3740816, 4676020, 9352040, 18704080]

約数ペア:

[(1, 18704080), (2, 9352040), (4, 4676020), (5, 3740816), (8, 2338010), (10, 1870408), (16, 1169005), (17, 1100240), (20, 935204), (34, 550120), (40, 467602), (68, 275060), (80, 233801), (85, 220048), (136, 137530), (170, 110024), (272, 68765), (289, 64720), (340, 55012), (578, 32360), (680, 27506), (809, 23120), (1156, 16180), (1360, 13753), (1445, 12944), (1618, 11560), (2312, 8090), (2890, 6472), (3236, 5780), (4045, 4624)]