551423240

素因数分解:

$2^3\times 5^1\times {\mathrm{1993}}^1\times {\mathrm{6917}}^1$

素因数の和:8921

約数の個数: 32

約数和(自身を含む): 1241504280

約数和(自身を除く): 690081040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1993, 3986, 6917, 7972, 9965, 13834, 15944, 19930, 27668, 34585, 39860, 55336, 69170, 79720, 138340, 276680, 13785581, 27571162, 55142324, 68927905, 110284648, 137855810, 275711620, 551423240]

約数ペア:

[(1, 551423240), (2, 275711620), (4, 137855810), (5, 110284648), (8, 68927905), (10, 55142324), (20, 27571162), (40, 13785581), (1993, 276680), (3986, 138340), (6917, 79720), (7972, 69170), (9965, 55336), (13834, 39860), (15944, 34585), (19930, 27668)]