210201980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1\times {\mathrm{439}}^1$

素因数の和:806

約数の個数: 48

約数和(自身を含む): 449064000

約数和(自身を除く): 238862020

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 269, 356, 439, 445, 538, 878, 890, 1076, 1345, 1756, 1780, 2195, 2690, 4390, 5380, 8780, 23941, 39071, 47882, 78142, 95764, 118091, 119705, 156284, 195355, 236182, 239410, 390710, 472364, 478820, 590455, 781420, 1180910, 2361820, 10510099, 21020198, 42040396, 52550495, 105100990, 210201980]

約数ペア:

[(1, 210201980), (2, 105100990), (4, 52550495), (5, 42040396), (10, 21020198), (20, 10510099), (89, 2361820), (178, 1180910), (269, 781420), (356, 590455), (439, 478820), (445, 472364), (538, 390710), (878, 239410), (890, 236182), (1076, 195355), (1345, 156284), (1756, 119705), (1780, 118091), (2195, 95764), (2690, 78142), (4390, 47882), (5380, 39071), (8780, 23941)]