90816820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{229}}^1\times {\mathrm{251}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 194745600

約数和(自身を除く): 103928780

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 229, 251, 316, 395, 458, 502, 790, 916, 1004, 1145, 1255, 1580, 2290, 2510, 4580, 5020, 18091, 19829, 36182, 39658, 57479, 72364, 79316, 90455, 99145, 114958, 180910, 198290, 229916, 287395, 361820, 396580, 574790, 1149580, 4540841, 9081682, 18163364, 22704205, 45408410, 90816820]

約数ペア:

[(1, 90816820), (2, 45408410), (4, 22704205), (5, 18163364), (10, 9081682), (20, 4540841), (79, 1149580), (158, 574790), (229, 396580), (251, 361820), (316, 287395), (395, 229916), (458, 198290), (502, 180910), (790, 114958), (916, 99145), (1004, 90455), (1145, 79316), (1255, 72364), (1580, 57479), (2290, 39658), (2510, 36182), (4580, 19829), (5020, 18091)]