21126976

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{379}}^1$

素因数の和:471

約数の個数: 56

約数和(自身を含む): 45943520

約数和(自身を除く): 24816544

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 67, 104, 134, 208, 268, 379, 416, 536, 758, 832, 871, 1072, 1516, 1742, 2144, 3032, 3484, 4288, 4927, 6064, 6968, 9854, 12128, 13936, 19708, 24256, 25393, 27872, 39416, 50786, 55744, 78832, 101572, 157664, 203144, 315328, 330109, 406288, 660218, 812576, 1320436, 1625152, 2640872, 5281744, 10563488, 21126976]

約数ペア:

[(1, 21126976), (2, 10563488), (4, 5281744), (8, 2640872), (13, 1625152), (16, 1320436), (26, 812576), (32, 660218), (52, 406288), (64, 330109), (67, 315328), (104, 203144), (134, 157664), (208, 101572), (268, 78832), (379, 55744), (416, 50786), (536, 39416), (758, 27872), (832, 25393), (871, 24256), (1072, 19708), (1516, 13936), (1742, 12128), (2144, 9854), (3032, 6968), (3484, 6064), (4288, 4927)]