21581648

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2609}}^1$

素因数の和:2675

約数の個数: 40

約数和(自身を含む): 46604160

約数和(自身を除く): 25022512

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 47, 88, 94, 176, 188, 376, 517, 752, 1034, 2068, 2609, 4136, 5218, 8272, 10436, 20872, 28699, 41744, 57398, 114796, 122623, 229592, 245246, 459184, 490492, 980984, 1348853, 1961968, 2697706, 5395412, 10790824, 21581648]

約数ペア:

[(1, 21581648), (2, 10790824), (4, 5395412), (8, 2697706), (11, 1961968), (16, 1348853), (22, 980984), (44, 490492), (47, 459184), (88, 245246), (94, 229592), (176, 122623), (188, 114796), (376, 57398), (517, 41744), (752, 28699), (1034, 20872), (2068, 10436), (2609, 8272), (4136, 5218)]