21192808

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{677}}^1$

素因数の和:746

約数の個数: 64

約数和(自身を含む): 50117760

約数和(自身を除く): 28924952

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 43, 52, 56, 86, 91, 104, 172, 182, 301, 344, 364, 559, 602, 677, 728, 1118, 1204, 1354, 2236, 2408, 2708, 3913, 4472, 4739, 5416, 7826, 8801, 9478, 15652, 17602, 18956, 29111, 31304, 35204, 37912, 58222, 61607, 70408, 116444, 123214, 203777, 232888, 246428, 378443, 407554, 492856, 756886, 815108, 1513772, 1630216, 2649101, 3027544, 5298202, 10596404, 21192808]

約数ペア:

[(1, 21192808), (2, 10596404), (4, 5298202), (7, 3027544), (8, 2649101), (13, 1630216), (14, 1513772), (26, 815108), (28, 756886), (43, 492856), (52, 407554), (56, 378443), (86, 246428), (91, 232888), (104, 203777), (172, 123214), (182, 116444), (301, 70408), (344, 61607), (364, 58222), (559, 37912), (602, 35204), (677, 31304), (728, 29111), (1118, 18956), (1204, 17602), (1354, 15652), (2236, 9478), (2408, 8801), (2708, 7826), (3913, 5416), (4472, 4739)]