20778400

素因数分解:

$2^5\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1367}}^1$

素因数の和:1406

約数の個数: 72

約数和(自身を含む): 53434080

約数和(自身を除く): 32655680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 76, 80, 95, 100, 152, 160, 190, 200, 304, 380, 400, 475, 608, 760, 800, 950, 1367, 1520, 1900, 2734, 3040, 3800, 5468, 6835, 7600, 10936, 13670, 15200, 21872, 25973, 27340, 34175, 43744, 51946, 54680, 68350, 103892, 109360, 129865, 136700, 207784, 218720, 259730, 273400, 415568, 519460, 546800, 649325, 831136, 1038920, 1093600, 1298650, 2077840, 2597300, 4155680, 5194600, 10389200, 20778400]

約数ペア:

[(1, 20778400), (2, 10389200), (4, 5194600), (5, 4155680), (8, 2597300), (10, 2077840), (16, 1298650), (19, 1093600), (20, 1038920), (25, 831136), (32, 649325), (38, 546800), (40, 519460), (50, 415568), (76, 273400), (80, 259730), (95, 218720), (100, 207784), (152, 136700), (160, 129865), (190, 109360), (200, 103892), (304, 68350), (380, 54680), (400, 51946), (475, 43744), (608, 34175), (760, 27340), (800, 25973), (950, 21872), (1367, 15200), (1520, 13670), (1900, 10936), (2734, 7600), (3040, 6835), (3800, 5468)]