20916540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4007}}^1$

素因数の和:4051

約数の個数: 72

約数和(自身を含む): 65651040

約数和(自身を除く): 44734500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4007, 5220, 8014, 12021, 16028, 20035, 24042, 36063, 40070, 48084, 60105, 72126, 80140, 116203, 120210, 144252, 180315, 232406, 240420, 348609, 360630, 464812, 581015, 697218, 721260, 1045827, 1162030, 1394436, 1743045, 2091654, 2324060, 3486090, 4183308, 5229135, 6972180, 10458270, 20916540]

約数ペア:

[(1, 20916540), (2, 10458270), (3, 6972180), (4, 5229135), (5, 4183308), (6, 3486090), (9, 2324060), (10, 2091654), (12, 1743045), (15, 1394436), (18, 1162030), (20, 1045827), (29, 721260), (30, 697218), (36, 581015), (45, 464812), (58, 360630), (60, 348609), (87, 240420), (90, 232406), (116, 180315), (145, 144252), (174, 120210), (180, 116203), (261, 80140), (290, 72126), (348, 60105), (435, 48084), (522, 40070), (580, 36063), (870, 24042), (1044, 20035), (1305, 16028), (1740, 12021), (2610, 8014), (4007, 5220)]