21881020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2141}}^1$

素因数の和:2230

約数の個数: 48

約数和(自身を含む): 53258688

約数和(自身を除く): 31377668

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 2044, 2141, 2555, 4282, 5110, 8564, 10220, 10705, 14987, 21410, 29974, 42820, 59948, 74935, 149870, 156293, 299740, 312586, 625172, 781465, 1094051, 1562930, 2188102, 3125860, 4376204, 5470255, 10940510, 21881020]

約数ペア:

[(1, 21881020), (2, 10940510), (4, 5470255), (5, 4376204), (7, 3125860), (10, 2188102), (14, 1562930), (20, 1094051), (28, 781465), (35, 625172), (70, 312586), (73, 299740), (140, 156293), (146, 149870), (292, 74935), (365, 59948), (511, 42820), (730, 29974), (1022, 21410), (1460, 14987), (2044, 10705), (2141, 10220), (2555, 8564), (4282, 5110)]