21440367

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 13940433

約数列:

[1, 3, 9, 13, 29, 39, 71, 87, 89, 117, 213, 261, 267, 377, 639, 801, 923, 1131, 1157, 2059, 2581, 2769, 3393, 3471, 6177, 6319, 7743, 8307, 10413, 18531, 18957, 23229, 26767, 33553, 56871, 80301, 82147, 100659, 183251, 240903, 246441, 301977, 549753, 739323, 1649259, 2382263, 7146789, 21440367]

約数ペア:

[(1, 21440367), (3, 7146789), (9, 2382263), (13, 1649259), (29, 739323), (39, 549753), (71, 301977), (87, 246441), (89, 240903), (117, 183251), (213, 100659), (261, 82147), (267, 80301), (377, 56871), (639, 33553), (801, 26767), (923, 23229), (1131, 18957), (1157, 18531), (2059, 10413), (2581, 8307), (2769, 7743), (3393, 6319), (3471, 6177)]