19179620

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 41664000

約数和(自身を除く): 22484380

約数列:

[1, 2, 4, 5, 10, 20, 61, 79, 122, 158, 199, 244, 305, 316, 395, 398, 610, 790, 796, 995, 1220, 1580, 1990, 3980, 4819, 9638, 12139, 15721, 19276, 24095, 24278, 31442, 48190, 48556, 60695, 62884, 78605, 96380, 121390, 157210, 242780, 314420, 958981, 1917962, 3835924, 4794905, 9589810, 19179620]

約数ペア:

[(1, 19179620), (2, 9589810), (4, 4794905), (5, 3835924), (10, 1917962), (20, 958981), (61, 314420), (79, 242780), (122, 157210), (158, 121390), (199, 96380), (244, 78605), (305, 62884), (316, 60695), (395, 48556), (398, 48190), (610, 31442), (790, 24278), (796, 24095), (995, 19276), (1220, 15721), (1580, 12139), (1990, 9638), (3980, 4819)]