20656545

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:474

約数の個数: 64

約数和(自身を含む): 41879040

約数和(自身を除く): 21222495

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 37, 39, 65, 91, 105, 111, 185, 195, 259, 273, 409, 455, 481, 555, 777, 1227, 1295, 1365, 1443, 2045, 2405, 2863, 3367, 3885, 5317, 6135, 7215, 8589, 10101, 14315, 15133, 15951, 16835, 26585, 37219, 42945, 45399, 50505, 75665, 79755, 105931, 111657, 186095, 196729, 226995, 317793, 529655, 558285, 590187, 983645, 1377103, 1588965, 2950935, 4131309, 6885515, 20656545]

約数ペア:

[(1, 20656545), (3, 6885515), (5, 4131309), (7, 2950935), (13, 1588965), (15, 1377103), (21, 983645), (35, 590187), (37, 558285), (39, 529655), (65, 317793), (91, 226995), (105, 196729), (111, 186095), (185, 111657), (195, 105931), (259, 79755), (273, 75665), (409, 50505), (455, 45399), (481, 42945), (555, 37219), (777, 26585), (1227, 16835), (1295, 15951), (1365, 15133), (1443, 14315), (2045, 10101), (2405, 8589), (2863, 7215), (3367, 6135), (3885, 5317)]