28387660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{349}}^1$

素因数の和:455

約数の個数: 72

約数和(自身を含む): 70383600

約数和(自身を除く): 41995940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 83, 98, 140, 166, 196, 245, 332, 349, 415, 490, 581, 698, 830, 980, 1162, 1396, 1660, 1745, 2324, 2443, 2905, 3490, 4067, 4886, 5810, 6980, 8134, 9772, 11620, 12215, 16268, 17101, 20335, 24430, 28967, 34202, 40670, 48860, 57934, 68404, 81340, 85505, 115868, 144835, 171010, 202769, 289670, 342020, 405538, 579340, 811076, 1013845, 1419383, 2027690, 2838766, 4055380, 5677532, 7096915, 14193830, 28387660]

約数ペア:

[(1, 28387660), (2, 14193830), (4, 7096915), (5, 5677532), (7, 4055380), (10, 2838766), (14, 2027690), (20, 1419383), (28, 1013845), (35, 811076), (49, 579340), (70, 405538), (83, 342020), (98, 289670), (140, 202769), (166, 171010), (196, 144835), (245, 115868), (332, 85505), (349, 81340), (415, 68404), (490, 57934), (581, 48860), (698, 40670), (830, 34202), (980, 28967), (1162, 24430), (1396, 20335), (1660, 17101), (1745, 16268), (2324, 12215), (2443, 11620), (2905, 9772), (3490, 8134), (4067, 6980), (4886, 5810)]