21537140

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{523}}^1$

素因数の和:632

約数の個数: 48

約数和(自身を含む): 47537280

約数和(自身を除く): 26000140

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 523, 580, 710, 1046, 1420, 2059, 2092, 2615, 4118, 5230, 8236, 10295, 10460, 15167, 20590, 30334, 37133, 41180, 60668, 74266, 75835, 148532, 151670, 185665, 303340, 371330, 742660, 1076857, 2153714, 4307428, 5384285, 10768570, 21537140]

約数ペア:

[(1, 21537140), (2, 10768570), (4, 5384285), (5, 4307428), (10, 2153714), (20, 1076857), (29, 742660), (58, 371330), (71, 303340), (116, 185665), (142, 151670), (145, 148532), (284, 75835), (290, 74266), (355, 60668), (523, 41180), (580, 37133), (710, 30334), (1046, 20590), (1420, 15167), (2059, 10460), (2092, 10295), (2615, 8236), (4118, 5230)]