21554416

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{599}}^1$

素因数の和:793

約数の個数: 40

約数和(自身を含む): 45309600

約数和(自身を除く): 23755184

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 173, 208, 346, 599, 692, 1198, 1384, 2249, 2396, 2768, 4498, 4792, 7787, 8996, 9584, 15574, 17992, 31148, 35984, 62296, 103627, 124592, 207254, 414508, 829016, 1347151, 1658032, 2694302, 5388604, 10777208, 21554416]

約数ペア:

[(1, 21554416), (2, 10777208), (4, 5388604), (8, 2694302), (13, 1658032), (16, 1347151), (26, 829016), (52, 414508), (104, 207254), (173, 124592), (208, 103627), (346, 62296), (599, 35984), (692, 31148), (1198, 17992), (1384, 15574), (2249, 9584), (2396, 8996), (2768, 7787), (4498, 4792)]