20697872

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{659}}^1$

素因数の和:831

約数の個数: 40

約数和(自身を含む): 43538880

約数和(自身を除く): 22841008

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 151, 208, 302, 604, 659, 1208, 1318, 1963, 2416, 2636, 3926, 5272, 7852, 8567, 10544, 15704, 17134, 31408, 34268, 68536, 99509, 137072, 199018, 398036, 796072, 1293617, 1592144, 2587234, 5174468, 10348936, 20697872]

約数ペア:

[(1, 20697872), (2, 10348936), (4, 5174468), (8, 2587234), (13, 1592144), (16, 1293617), (26, 796072), (52, 398036), (104, 199018), (151, 137072), (208, 99509), (302, 68536), (604, 34268), (659, 31408), (1208, 17134), (1318, 15704), (1963, 10544), (2416, 8567), (2636, 7852), (3926, 5272)]