81219580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312383}}^1$

素因数の和:312405

約数の個数: 24

約数和(自身を含む): 183681792

約数和(自身を除く): 102462212

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312383, 624766, 1249532, 1561915, 3123830, 4060979, 6247660, 8121958, 16243916, 20304895, 40609790, 81219580]

約数ペア:

[(1, 81219580), (2, 40609790), (4, 20304895), (5, 16243916), (10, 8121958), (13, 6247660), (20, 4060979), (26, 3123830), (52, 1561915), (65, 1249532), (130, 624766), (260, 312383)]