21379340

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{167}}^1\times {\mathrm{173}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 46654272

約数和(自身を除く): 25274932

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 167, 173, 185, 334, 346, 370, 668, 692, 740, 835, 865, 1670, 1730, 3340, 3460, 6179, 6401, 12358, 12802, 24716, 25604, 28891, 30895, 32005, 57782, 61790, 64010, 115564, 123580, 128020, 144455, 288910, 577820, 1068967, 2137934, 4275868, 5344835, 10689670, 21379340]

約数ペア:

[(1, 21379340), (2, 10689670), (4, 5344835), (5, 4275868), (10, 2137934), (20, 1068967), (37, 577820), (74, 288910), (148, 144455), (167, 128020), (173, 123580), (185, 115564), (334, 64010), (346, 61790), (370, 57782), (668, 32005), (692, 30895), (740, 28891), (835, 25604), (865, 24716), (1670, 12802), (1730, 12358), (3340, 6401), (3460, 6179)]