19877728

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{673}}^1$

素因数の和:767

約数の個数: 48

約数和(自身を含む): 42801696

約数和(自身を除く): 22923968

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 71, 104, 142, 208, 284, 416, 568, 673, 923, 1136, 1346, 1846, 2272, 2692, 3692, 5384, 7384, 8749, 10768, 14768, 17498, 21536, 29536, 34996, 47783, 69992, 95566, 139984, 191132, 279968, 382264, 621179, 764528, 1242358, 1529056, 2484716, 4969432, 9938864, 19877728]

約数ペア:

[(1, 19877728), (2, 9938864), (4, 4969432), (8, 2484716), (13, 1529056), (16, 1242358), (26, 764528), (32, 621179), (52, 382264), (71, 279968), (104, 191132), (142, 139984), (208, 95566), (284, 69992), (416, 47783), (568, 34996), (673, 29536), (923, 21536), (1136, 17498), (1346, 14768), (1846, 10768), (2272, 8749), (2692, 7384), (3692, 5384)]