19717760

素因数分解:

$2^7\times 5^1\times {\mathrm{30809}}^1$

素因数の和:30828

約数の個数: 32

約数和(自身を含む): 47139300

約数和(自身を除く): 27421540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 30809, 61618, 123236, 154045, 246472, 308090, 492944, 616180, 985888, 1232360, 1971776, 2464720, 3943552, 4929440, 9858880, 19717760]

約数ペア:

[(1, 19717760), (2, 9858880), (4, 4929440), (5, 3943552), (8, 2464720), (10, 1971776), (16, 1232360), (20, 985888), (32, 616180), (40, 492944), (64, 308090), (80, 246472), (128, 154045), (160, 123236), (320, 61618), (640, 30809)]