64436420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1\times {\mathrm{439}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 139708800

約数和(自身を除く): 75272380

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 179, 205, 358, 410, 439, 716, 820, 878, 895, 1756, 1790, 2195, 3580, 4390, 7339, 8780, 14678, 17999, 29356, 35998, 36695, 71996, 73390, 78581, 89995, 146780, 157162, 179990, 314324, 359980, 392905, 785810, 1571620, 3221821, 6443642, 12887284, 16109105, 32218210, 64436420]

約数ペア:

[(1, 64436420), (2, 32218210), (4, 16109105), (5, 12887284), (10, 6443642), (20, 3221821), (41, 1571620), (82, 785810), (164, 392905), (179, 359980), (205, 314324), (358, 179990), (410, 157162), (439, 146780), (716, 89995), (820, 78581), (878, 73390), (895, 71996), (1756, 36695), (1790, 35998), (2195, 29356), (3580, 17999), (4390, 14678), (7339, 8780)]