66949720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40823}}^1$

素因数の和:40875

約数の個数: 32

約数和(自身を含む): 154314720

約数和(自身を除く): 87365000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40823, 81646, 163292, 204115, 326584, 408230, 816460, 1632920, 1673743, 3347486, 6694972, 8368715, 13389944, 16737430, 33474860, 66949720]

約数ペア:

[(1, 66949720), (2, 33474860), (4, 16737430), (5, 13389944), (8, 8368715), (10, 6694972), (20, 3347486), (40, 1673743), (41, 1632920), (82, 816460), (164, 408230), (205, 326584), (328, 204115), (410, 163292), (820, 81646), (1640, 40823)]