21041780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{307}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25527820

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 149, 230, 298, 307, 460, 596, 614, 745, 1228, 1490, 1535, 2980, 3070, 3427, 6140, 6854, 7061, 13708, 14122, 17135, 28244, 34270, 35305, 45743, 68540, 70610, 91486, 141220, 182972, 228715, 457430, 914860, 1052089, 2104178, 4208356, 5260445, 10520890, 21041780]

約数ペア:

[(1, 21041780), (2, 10520890), (4, 5260445), (5, 4208356), (10, 2104178), (20, 1052089), (23, 914860), (46, 457430), (92, 228715), (115, 182972), (149, 141220), (230, 91486), (298, 70610), (307, 68540), (460, 45743), (596, 35305), (614, 34270), (745, 28244), (1228, 17135), (1490, 14122), (1535, 13708), (2980, 7061), (3070, 6854), (3427, 6140)]