7999550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:453

約数の個数: 48

約数和(自身を含む): 16582272

約数和(自身を除く): 8582722

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 130, 155, 310, 325, 397, 403, 650, 775, 794, 806, 1550, 1985, 2015, 3970, 4030, 5161, 9925, 10075, 10322, 12307, 19850, 20150, 24614, 25805, 51610, 61535, 123070, 129025, 159991, 258050, 307675, 319982, 615350, 799955, 1599910, 3999775, 7999550]

約数ペア:

[(1, 7999550), (2, 3999775), (5, 1599910), (10, 799955), (13, 615350), (25, 319982), (26, 307675), (31, 258050), (50, 159991), (62, 129025), (65, 123070), (130, 61535), (155, 51610), (310, 25805), (325, 24614), (397, 20150), (403, 19850), (650, 12307), (775, 10322), (794, 10075), (806, 9925), (1550, 5161), (1985, 4030), (2015, 3970)]