978012880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{487}}^1\times {\mathrm{1931}}^1$

素因数の和:2444

約数の個数: 80

約数和(自身を含む): 2455092864

約数和(自身を除く): 1477079984

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 487, 520, 974, 1040, 1931, 1948, 2435, 3862, 3896, 4870, 6331, 7724, 7792, 9655, 9740, 12662, 15448, 19310, 19480, 25103, 25324, 30896, 31655, 38620, 38960, 50206, 50648, 63310, 77240, 100412, 101296, 125515, 126620, 154480, 200824, 251030, 253240, 401648, 502060, 506480, 940397, 1004120, 1880794, 2008240, 3761588, 4701985, 7523176, 9403970, 12225161, 15046352, 18807940, 24450322, 37615880, 48900644, 61125805, 75231760, 97801288, 122251610, 195602576, 244503220, 489006440, 978012880]

約数ペア:

[(1, 978012880), (2, 489006440), (4, 244503220), (5, 195602576), (8, 122251610), (10, 97801288), (13, 75231760), (16, 61125805), (20, 48900644), (26, 37615880), (40, 24450322), (52, 18807940), (65, 15046352), (80, 12225161), (104, 9403970), (130, 7523176), (208, 4701985), (260, 3761588), (487, 2008240), (520, 1880794), (974, 1004120), (1040, 940397), (1931, 506480), (1948, 502060), (2435, 401648), (3862, 253240), (3896, 251030), (4870, 200824), (6331, 154480), (7724, 126620), (7792, 125515), (9655, 101296), (9740, 100412), (12662, 77240), (15448, 63310), (19310, 50648), (19480, 50206), (25103, 38960), (25324, 38620), (30896, 31655)]