18996965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 26078976

約数和(自身を除く): 7082011

約数列:

[1, 5, 13, 23, 65, 97, 115, 131, 299, 485, 655, 1261, 1495, 1703, 2231, 3013, 6305, 8515, 11155, 12707, 15065, 29003, 39169, 63535, 145015, 165191, 195845, 292261, 825955, 1461305, 3799393, 18996965]

約数ペア:

[(1, 18996965), (5, 3799393), (13, 1461305), (23, 825955), (65, 292261), (97, 195845), (115, 165191), (131, 145015), (299, 63535), (485, 39169), (655, 29003), (1261, 15065), (1495, 12707), (1703, 11155), (2231, 8515), (3013, 6305)]