20987200

素因数分解:

$2^6\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1009}}^1$

素因数の和:1044

約数の個数: 84

約数和(自身を含む): 55669180

約数和(自身を除く): 34681980

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 130, 160, 200, 208, 260, 320, 325, 400, 416, 520, 650, 800, 832, 1009, 1040, 1300, 1600, 2018, 2080, 2600, 4036, 4160, 5045, 5200, 8072, 10090, 10400, 13117, 16144, 20180, 20800, 25225, 26234, 32288, 40360, 50450, 52468, 64576, 65585, 80720, 100900, 104936, 131170, 161440, 201800, 209872, 262340, 322880, 327925, 403600, 419744, 524680, 655850, 807200, 839488, 1049360, 1311700, 1614400, 2098720, 2623400, 4197440, 5246800, 10493600, 20987200]

約数ペア:

[(1, 20987200), (2, 10493600), (4, 5246800), (5, 4197440), (8, 2623400), (10, 2098720), (13, 1614400), (16, 1311700), (20, 1049360), (25, 839488), (26, 807200), (32, 655850), (40, 524680), (50, 419744), (52, 403600), (64, 327925), (65, 322880), (80, 262340), (100, 209872), (104, 201800), (130, 161440), (160, 131170), (200, 104936), (208, 100900), (260, 80720), (320, 65585), (325, 64576), (400, 52468), (416, 50450), (520, 40360), (650, 32288), (800, 26234), (832, 25225), (1009, 20800), (1040, 20180), (1300, 16144), (1600, 13117), (2018, 10400), (2080, 10090), (2600, 8072), (4036, 5200), (4160, 5045)]