21684416

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:481

約数の個数: 56

約数和(自身を含む): 47152560

約数和(自身を除く): 25468144

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 67, 104, 134, 208, 268, 389, 416, 536, 778, 832, 871, 1072, 1556, 1742, 2144, 3112, 3484, 4288, 5057, 6224, 6968, 10114, 12448, 13936, 20228, 24896, 26063, 27872, 40456, 52126, 55744, 80912, 104252, 161824, 208504, 323648, 338819, 417008, 677638, 834016, 1355276, 1668032, 2710552, 5421104, 10842208, 21684416]

約数ペア:

[(1, 21684416), (2, 10842208), (4, 5421104), (8, 2710552), (13, 1668032), (16, 1355276), (26, 834016), (32, 677638), (52, 417008), (64, 338819), (67, 323648), (104, 208504), (134, 161824), (208, 104252), (268, 80912), (389, 55744), (416, 52126), (536, 40456), (778, 27872), (832, 26063), (871, 24896), (1072, 20228), (1556, 13936), (1742, 12448), (2144, 10114), (3112, 6968), (3484, 6224), (4288, 5057)]