19955000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{307}}^1$

素因数の和:346

約数の個数: 80

約数和(自身を含む): 50515080

約数和(自身を除く): 30560080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 307, 325, 500, 520, 614, 625, 650, 1000, 1228, 1250, 1300, 1535, 1625, 2456, 2500, 2600, 3070, 3250, 3991, 5000, 6140, 6500, 7675, 7982, 8125, 12280, 13000, 15350, 15964, 16250, 19955, 30700, 31928, 32500, 38375, 39910, 61400, 65000, 76750, 79820, 99775, 153500, 159640, 191875, 199550, 307000, 383750, 399100, 498875, 767500, 798200, 997750, 1535000, 1995500, 2494375, 3991000, 4988750, 9977500, 19955000]

約数ペア:

[(1, 19955000), (2, 9977500), (4, 4988750), (5, 3991000), (8, 2494375), (10, 1995500), (13, 1535000), (20, 997750), (25, 798200), (26, 767500), (40, 498875), (50, 399100), (52, 383750), (65, 307000), (100, 199550), (104, 191875), (125, 159640), (130, 153500), (200, 99775), (250, 79820), (260, 76750), (307, 65000), (325, 61400), (500, 39910), (520, 38375), (614, 32500), (625, 31928), (650, 30700), (1000, 19955), (1228, 16250), (1250, 15964), (1300, 15350), (1535, 13000), (1625, 12280), (2456, 8125), (2500, 7982), (2600, 7675), (3070, 6500), (3250, 6140), (3991, 5000)]