21065680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13859}}^1$

素因数の和:13891

約数の個数: 40

約数和(自身を含む): 51559200

約数和(自身を除く): 30493520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13859, 27718, 55436, 69295, 110872, 138590, 221744, 263321, 277180, 526642, 554360, 1053284, 1108720, 1316605, 2106568, 2633210, 4213136, 5266420, 10532840, 21065680]

約数ペア:

[(1, 21065680), (2, 10532840), (4, 5266420), (5, 4213136), (8, 2633210), (10, 2106568), (16, 1316605), (19, 1108720), (20, 1053284), (38, 554360), (40, 526642), (76, 277180), (80, 263321), (95, 221744), (152, 138590), (190, 110872), (304, 69295), (380, 55436), (760, 27718), (1520, 13859)]