20636775

素因数分解:

$3^5\times 5^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 39719680

約数和(自身を除く): 19082905

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 79, 81, 129, 135, 215, 225, 237, 243, 387, 395, 405, 645, 675, 711, 1075, 1161, 1185, 1215, 1935, 1975, 2025, 2133, 3225, 3397, 3483, 3555, 5805, 5925, 6075, 6399, 9675, 10191, 10449, 10665, 16985, 17415, 17775, 19197, 29025, 30573, 31995, 50955, 52245, 53325, 84925, 87075, 91719, 95985, 152865, 159975, 254775, 261225, 275157, 458595, 479925, 764325, 825471, 1375785, 2292975, 4127355, 6878925, 20636775]

約数ペア:

[(1, 20636775), (3, 6878925), (5, 4127355), (9, 2292975), (15, 1375785), (25, 825471), (27, 764325), (43, 479925), (45, 458595), (75, 275157), (79, 261225), (81, 254775), (129, 159975), (135, 152865), (215, 95985), (225, 91719), (237, 87075), (243, 84925), (387, 53325), (395, 52245), (405, 50955), (645, 31995), (675, 30573), (711, 29025), (1075, 19197), (1161, 17775), (1185, 17415), (1215, 16985), (1935, 10665), (1975, 10449), (2025, 10191), (2133, 9675), (3225, 6399), (3397, 6075), (3483, 5925), (3555, 5805)]