28688440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{577}}^1$

素因数の和:712

約数の個数: 64

約数和(自身を含む): 71163360

約数和(自身を除く): 42474920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 113, 220, 226, 440, 452, 565, 577, 904, 1130, 1154, 1243, 2260, 2308, 2486, 2885, 4520, 4616, 4972, 5770, 6215, 6347, 9944, 11540, 12430, 12694, 23080, 24860, 25388, 31735, 49720, 50776, 63470, 65201, 126940, 130402, 253880, 260804, 326005, 521608, 652010, 717211, 1304020, 1434422, 2608040, 2868844, 3586055, 5737688, 7172110, 14344220, 28688440]

約数ペア:

[(1, 28688440), (2, 14344220), (4, 7172110), (5, 5737688), (8, 3586055), (10, 2868844), (11, 2608040), (20, 1434422), (22, 1304020), (40, 717211), (44, 652010), (55, 521608), (88, 326005), (110, 260804), (113, 253880), (220, 130402), (226, 126940), (440, 65201), (452, 63470), (565, 50776), (577, 49720), (904, 31735), (1130, 25388), (1154, 24860), (1243, 23080), (2260, 12694), (2308, 12430), (2486, 11540), (2885, 9944), (4520, 6347), (4616, 6215), (4972, 5770)]