20918500

素因数分解:

$2^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:166

約数の個数: 96

約数和(自身を含む): 50948352

約数和(自身を除く): 30029852

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 25, 34, 46, 50, 68, 85, 92, 100, 107, 115, 125, 170, 214, 230, 250, 340, 391, 425, 428, 460, 500, 535, 575, 782, 850, 1070, 1150, 1564, 1700, 1819, 1955, 2125, 2140, 2300, 2461, 2675, 2875, 3638, 3910, 4250, 4922, 5350, 5750, 7276, 7820, 8500, 9095, 9775, 9844, 10700, 11500, 12305, 13375, 18190, 19550, 24610, 26750, 36380, 39100, 41837, 45475, 48875, 49220, 53500, 61525, 83674, 90950, 97750, 123050, 167348, 181900, 195500, 209185, 227375, 246100, 307625, 418370, 454750, 615250, 836740, 909500, 1045925, 1230500, 2091850, 4183700, 5229625, 10459250, 20918500]

約数ペア:

[(1, 20918500), (2, 10459250), (4, 5229625), (5, 4183700), (10, 2091850), (17, 1230500), (20, 1045925), (23, 909500), (25, 836740), (34, 615250), (46, 454750), (50, 418370), (68, 307625), (85, 246100), (92, 227375), (100, 209185), (107, 195500), (115, 181900), (125, 167348), (170, 123050), (214, 97750), (230, 90950), (250, 83674), (340, 61525), (391, 53500), (425, 49220), (428, 48875), (460, 45475), (500, 41837), (535, 39100), (575, 36380), (782, 26750), (850, 24610), (1070, 19550), (1150, 18190), (1564, 13375), (1700, 12305), (1819, 11500), (1955, 10700), (2125, 9844), (2140, 9775), (2300, 9095), (2461, 8500), (2675, 7820), (2875, 7276), (3638, 5750), (3910, 5350), (4250, 4922)]