21243976

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{827}}^1$

素因数の和:878

約数の個数: 48

約数和(自身を含む): 45457200

約数和(自身を除く): 24213224

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 169, 247, 338, 494, 676, 827, 988, 1352, 1654, 1976, 3211, 3308, 6422, 6616, 10751, 12844, 15713, 21502, 25688, 31426, 43004, 62852, 86008, 125704, 139763, 204269, 279526, 408538, 559052, 817076, 1118104, 1634152, 2655497, 5310994, 10621988, 21243976]

約数ペア:

[(1, 21243976), (2, 10621988), (4, 5310994), (8, 2655497), (13, 1634152), (19, 1118104), (26, 817076), (38, 559052), (52, 408538), (76, 279526), (104, 204269), (152, 139763), (169, 125704), (247, 86008), (338, 62852), (494, 43004), (676, 31426), (827, 25688), (988, 21502), (1352, 15713), (1654, 12844), (1976, 10751), (3211, 6616), (3308, 6422)]