21448528

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{521}}^1$

素因数の和:643

約数の個数: 40

約数和(自身を含む): 43497216

約数和(自身を除く): 22048688

約数列:

[1, 2, 4, 8, 16, 31, 62, 83, 124, 166, 248, 332, 496, 521, 664, 1042, 1328, 2084, 2573, 4168, 5146, 8336, 10292, 16151, 20584, 32302, 41168, 43243, 64604, 86486, 129208, 172972, 258416, 345944, 691888, 1340533, 2681066, 5362132, 10724264, 21448528]

約数ペア:

[(1, 21448528), (2, 10724264), (4, 5362132), (8, 2681066), (16, 1340533), (31, 691888), (62, 345944), (83, 258416), (124, 172972), (166, 129208), (248, 86486), (332, 64604), (496, 43243), (521, 41168), (664, 32302), (1042, 20584), (1328, 16151), (2084, 10292), (2573, 8336), (4168, 5146)]