19857500

素因数分解:

$2^2\times 5^4\times {\mathrm{13}}^2\times {\mathrm{47}}^1$

素因数の和:97

約数の個数: 90

約数和(自身を含む): 48022128

約数和(自身を除く): 28164628

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 47, 50, 52, 65, 94, 100, 125, 130, 169, 188, 235, 250, 260, 325, 338, 470, 500, 611, 625, 650, 676, 845, 940, 1175, 1222, 1250, 1300, 1625, 1690, 2350, 2444, 2500, 3055, 3250, 3380, 4225, 4700, 5875, 6110, 6500, 7943, 8125, 8450, 11750, 12220, 15275, 15886, 16250, 16900, 21125, 23500, 29375, 30550, 31772, 32500, 39715, 42250, 58750, 61100, 76375, 79430, 84500, 105625, 117500, 152750, 158860, 198575, 211250, 305500, 381875, 397150, 422500, 763750, 794300, 992875, 1527500, 1985750, 3971500, 4964375, 9928750, 19857500]

約数ペア:

[(1, 19857500), (2, 9928750), (4, 4964375), (5, 3971500), (10, 1985750), (13, 1527500), (20, 992875), (25, 794300), (26, 763750), (47, 422500), (50, 397150), (52, 381875), (65, 305500), (94, 211250), (100, 198575), (125, 158860), (130, 152750), (169, 117500), (188, 105625), (235, 84500), (250, 79430), (260, 76375), (325, 61100), (338, 58750), (470, 42250), (500, 39715), (611, 32500), (625, 31772), (650, 30550), (676, 29375), (845, 23500), (940, 21125), (1175, 16900), (1222, 16250), (1250, 15886), (1300, 15275), (1625, 12220), (1690, 11750), (2350, 8450), (2444, 8125), (2500, 7943), (3055, 6500), (3250, 6110), (3380, 5875), (4225, 4700)]