16639880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 22551160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 53, 94, 106, 167, 188, 212, 235, 265, 334, 376, 424, 470, 530, 668, 835, 940, 1060, 1336, 1670, 1880, 2120, 2491, 3340, 4982, 6680, 7849, 8851, 9964, 12455, 15698, 17702, 19928, 24910, 31396, 35404, 39245, 44255, 49820, 62792, 70808, 78490, 88510, 99640, 156980, 177020, 313960, 354040, 415997, 831994, 1663988, 2079985, 3327976, 4159970, 8319940, 16639880]

約数ペア:

[(1, 16639880), (2, 8319940), (4, 4159970), (5, 3327976), (8, 2079985), (10, 1663988), (20, 831994), (40, 415997), (47, 354040), (53, 313960), (94, 177020), (106, 156980), (167, 99640), (188, 88510), (212, 78490), (235, 70808), (265, 62792), (334, 49820), (376, 44255), (424, 39245), (470, 35404), (530, 31396), (668, 24910), (835, 19928), (940, 17702), (1060, 15698), (1336, 12455), (1670, 9964), (1880, 8851), (2120, 7849), (2491, 6680), (3340, 4982)]