19877936

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{421}}^1$

素因数の和:669

約数の個数: 40

約数和(自身を含む): 41757744

約数和(自身を除く): 21879808

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 227, 421, 454, 842, 908, 1684, 1816, 2951, 3368, 3632, 5473, 5902, 6736, 10946, 11804, 21892, 23608, 43784, 47216, 87568, 95567, 191134, 382268, 764536, 1242371, 1529072, 2484742, 4969484, 9938968, 19877936]

約数ペア:

[(1, 19877936), (2, 9938968), (4, 4969484), (8, 2484742), (13, 1529072), (16, 1242371), (26, 764536), (52, 382268), (104, 191134), (208, 95567), (227, 87568), (421, 47216), (454, 43784), (842, 23608), (908, 21892), (1684, 11804), (1816, 10946), (2951, 6736), (3368, 5902), (3632, 5473)]