19868895

素因数分解:

$3^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:128

約数の個数: 64

約数和(自身を含む): 37785600

約数和(自身を除く): 17916705

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 79, 81, 115, 135, 207, 237, 243, 345, 395, 405, 621, 711, 729, 1035, 1185, 1215, 1817, 1863, 2133, 2187, 3105, 3555, 3645, 5451, 5589, 6399, 9085, 9315, 10665, 10935, 16353, 16767, 19197, 27255, 27945, 31995, 49059, 50301, 57591, 81765, 83835, 95985, 147177, 172773, 245295, 251505, 287955, 441531, 735885, 863865, 1324593, 2207655, 3973779, 6622965, 19868895]

約数ペア:

[(1, 19868895), (3, 6622965), (5, 3973779), (9, 2207655), (15, 1324593), (23, 863865), (27, 735885), (45, 441531), (69, 287955), (79, 251505), (81, 245295), (115, 172773), (135, 147177), (207, 95985), (237, 83835), (243, 81765), (345, 57591), (395, 50301), (405, 49059), (621, 31995), (711, 27945), (729, 27255), (1035, 19197), (1185, 16767), (1215, 16353), (1817, 10935), (1863, 10665), (2133, 9315), (2187, 9085), (3105, 6399), (3555, 5589), (3645, 5451)]