78540880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{599}}^1$

素因数の和:772

約数の個数: 80

約数和(自身を含む): 200880000

約数和(自身を除く): 122339120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 149, 176, 220, 298, 440, 596, 599, 745, 880, 1192, 1198, 1490, 1639, 2384, 2396, 2980, 2995, 3278, 4792, 5960, 5990, 6556, 6589, 8195, 9584, 11920, 11980, 13112, 13178, 16390, 23960, 26224, 26356, 32780, 32945, 47920, 52712, 65560, 65890, 89251, 105424, 131120, 131780, 178502, 263560, 357004, 446255, 527120, 714008, 892510, 981761, 1428016, 1785020, 1963522, 3570040, 3927044, 4908805, 7140080, 7854088, 9817610, 15708176, 19635220, 39270440, 78540880]

約数ペア:

[(1, 78540880), (2, 39270440), (4, 19635220), (5, 15708176), (8, 9817610), (10, 7854088), (11, 7140080), (16, 4908805), (20, 3927044), (22, 3570040), (40, 1963522), (44, 1785020), (55, 1428016), (80, 981761), (88, 892510), (110, 714008), (149, 527120), (176, 446255), (220, 357004), (298, 263560), (440, 178502), (596, 131780), (599, 131120), (745, 105424), (880, 89251), (1192, 65890), (1198, 65560), (1490, 52712), (1639, 47920), (2384, 32945), (2396, 32780), (2980, 26356), (2995, 26224), (3278, 23960), (4792, 16390), (5960, 13178), (5990, 13112), (6556, 11980), (6589, 11920), (8195, 9584)]