21386020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{337}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 47698560

約数和(自身を除く): 26312540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 167, 190, 334, 337, 380, 668, 674, 835, 1348, 1670, 1685, 3173, 3340, 3370, 6346, 6403, 6740, 12692, 12806, 15865, 25612, 31730, 32015, 56279, 63460, 64030, 112558, 128060, 225116, 281395, 562790, 1069301, 1125580, 2138602, 4277204, 5346505, 10693010, 21386020]

約数ペア:

[(1, 21386020), (2, 10693010), (4, 5346505), (5, 4277204), (10, 2138602), (19, 1125580), (20, 1069301), (38, 562790), (76, 281395), (95, 225116), (167, 128060), (190, 112558), (334, 64030), (337, 63460), (380, 56279), (668, 32015), (674, 31730), (835, 25612), (1348, 15865), (1670, 12806), (1685, 12692), (3173, 6740), (3340, 6403), (3370, 6346)]