19820840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{811}}^1$

素因数の和:882

約数の個数: 64

約数和(自身を含む): 49109760

約数和(自身を除く): 29288920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 47, 52, 65, 94, 104, 130, 188, 235, 260, 376, 470, 520, 611, 811, 940, 1222, 1622, 1880, 2444, 3055, 3244, 4055, 4888, 6110, 6488, 8110, 10543, 12220, 16220, 21086, 24440, 32440, 38117, 42172, 52715, 76234, 84344, 105430, 152468, 190585, 210860, 304936, 381170, 421720, 495521, 762340, 991042, 1524680, 1982084, 2477605, 3964168, 4955210, 9910420, 19820840]

約数ペア:

[(1, 19820840), (2, 9910420), (4, 4955210), (5, 3964168), (8, 2477605), (10, 1982084), (13, 1524680), (20, 991042), (26, 762340), (40, 495521), (47, 421720), (52, 381170), (65, 304936), (94, 210860), (104, 190585), (130, 152468), (188, 105430), (235, 84344), (260, 76234), (376, 52715), (470, 42172), (520, 38117), (611, 32440), (811, 24440), (940, 21086), (1222, 16220), (1622, 12220), (1880, 10543), (2444, 8110), (3055, 6488), (3244, 6110), (4055, 4888)]