20728860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1997}}^1$

素因数の和:2182

約数の個数: 48

約数和(自身を含む): 58405536

約数和(自身を除く): 37676676

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 173, 346, 519, 692, 865, 1038, 1730, 1997, 2076, 2595, 3460, 3994, 5190, 5991, 7988, 9985, 10380, 11982, 19970, 23964, 29955, 39940, 59910, 119820, 345481, 690962, 1036443, 1381924, 1727405, 2072886, 3454810, 4145772, 5182215, 6909620, 10364430, 20728860]

約数ペア:

[(1, 20728860), (2, 10364430), (3, 6909620), (4, 5182215), (5, 4145772), (6, 3454810), (10, 2072886), (12, 1727405), (15, 1381924), (20, 1036443), (30, 690962), (60, 345481), (173, 119820), (346, 59910), (519, 39940), (692, 29955), (865, 23964), (1038, 19970), (1730, 11982), (1997, 10380), (2076, 9985), (2595, 7988), (3460, 5991), (3994, 5190)]