638505790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{37493}}^1$

素因数の和:37644

約数の個数: 32

約数和(自身を含む): 1247200416

約数和(自身を除く): 608694626

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1310, 1703, 3406, 8515, 17030, 37493, 74986, 187465, 374930, 487409, 974818, 2437045, 4874090, 4911583, 9823166, 24557915, 49115830, 63850579, 127701158, 319252895, 638505790]

約数ペア:

[(1, 638505790), (2, 319252895), (5, 127701158), (10, 63850579), (13, 49115830), (26, 24557915), (65, 9823166), (130, 4911583), (131, 4874090), (262, 2437045), (655, 974818), (1310, 487409), (1703, 374930), (3406, 187465), (8515, 74986), (17030, 37493)]