20407130980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{79399}}^1$

素因数の和:79660

約数の個数: 48

約数和(自身を含む): 43699219200

約数和(自身を除く): 23292088220

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 181, 284, 355, 362, 710, 724, 905, 1420, 1810, 3620, 12851, 25702, 51404, 64255, 79399, 128510, 158798, 257020, 317596, 396995, 793990, 1587980, 5637329, 11274658, 14371219, 22549316, 28186645, 28742438, 56373290, 57484876, 71856095, 112746580, 143712190, 287424380, 1020356549, 2040713098, 4081426196, 5101782745, 10203565490, 20407130980]

約数ペア:

[(1, 20407130980), (2, 10203565490), (4, 5101782745), (5, 4081426196), (10, 2040713098), (20, 1020356549), (71, 287424380), (142, 143712190), (181, 112746580), (284, 71856095), (355, 57484876), (362, 56373290), (710, 28742438), (724, 28186645), (905, 22549316), (1420, 14371219), (1810, 11274658), (3620, 5637329), (12851, 1587980), (25702, 793990), (51404, 396995), (64255, 317596), (79399, 257020), (128510, 158798)]