7991000

素因数分解:

$2^3\times 5^3\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 19150560

約数和(自身を除く): 11159560

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 131, 200, 244, 250, 262, 305, 488, 500, 524, 610, 655, 1000, 1048, 1220, 1310, 1525, 2440, 2620, 3050, 3275, 5240, 6100, 6550, 7625, 7991, 12200, 13100, 15250, 15982, 16375, 26200, 30500, 31964, 32750, 39955, 61000, 63928, 65500, 79910, 131000, 159820, 199775, 319640, 399550, 799100, 998875, 1598200, 1997750, 3995500, 7991000]

約数ペア:

[(1, 7991000), (2, 3995500), (4, 1997750), (5, 1598200), (8, 998875), (10, 799100), (20, 399550), (25, 319640), (40, 199775), (50, 159820), (61, 131000), (100, 79910), (122, 65500), (125, 63928), (131, 61000), (200, 39955), (244, 32750), (250, 31964), (262, 30500), (305, 26200), (488, 16375), (500, 15982), (524, 15250), (610, 13100), (655, 12200), (1000, 7991), (1048, 7625), (1220, 6550), (1310, 6100), (1525, 5240), (2440, 3275), (2620, 3050)]