21417820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{281}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 46807488

約数和(自身を除く): 25389668

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 103, 148, 185, 206, 281, 370, 412, 515, 562, 740, 1030, 1124, 1405, 2060, 2810, 3811, 5620, 7622, 10397, 15244, 19055, 20794, 28943, 38110, 41588, 51985, 57886, 76220, 103970, 115772, 144715, 207940, 289430, 578860, 1070891, 2141782, 4283564, 5354455, 10708910, 21417820]

約数ペア:

[(1, 21417820), (2, 10708910), (4, 5354455), (5, 4283564), (10, 2141782), (20, 1070891), (37, 578860), (74, 289430), (103, 207940), (148, 144715), (185, 115772), (206, 103970), (281, 76220), (370, 57886), (412, 51985), (515, 41588), (562, 38110), (740, 28943), (1030, 20794), (1124, 19055), (1405, 15244), (2060, 10397), (2810, 7622), (3811, 5620)]