64778360

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39499}}^1$

素因数の和:39551

約数の個数: 32

約数和(自身を含む): 149310000

約数和(自身を除く): 84531640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 39499, 78998, 157996, 197495, 315992, 394990, 789980, 1579960, 1619459, 3238918, 6477836, 8097295, 12955672, 16194590, 32389180, 64778360]

約数ペア:

[(1, 64778360), (2, 32389180), (4, 16194590), (5, 12955672), (8, 8097295), (10, 6477836), (20, 3238918), (40, 1619459), (41, 1579960), (82, 789980), (164, 394990), (205, 315992), (328, 197495), (410, 157996), (820, 78998), (1640, 39499)]