19681640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1091}}^1$

素因数の和:1154

約数の個数: 64

約数和(自身を含む): 49533120

約数和(自身を除く): 29851480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1091, 1640, 1804, 2182, 2255, 3608, 4364, 4510, 5455, 8728, 9020, 10910, 12001, 18040, 21820, 24002, 43640, 44731, 48004, 60005, 89462, 96008, 120010, 178924, 223655, 240020, 357848, 447310, 480040, 492041, 894620, 984082, 1789240, 1968164, 2460205, 3936328, 4920410, 9840820, 19681640]

約数ペア:

[(1, 19681640), (2, 9840820), (4, 4920410), (5, 3936328), (8, 2460205), (10, 1968164), (11, 1789240), (20, 984082), (22, 894620), (40, 492041), (41, 480040), (44, 447310), (55, 357848), (82, 240020), (88, 223655), (110, 178924), (164, 120010), (205, 96008), (220, 89462), (328, 60005), (410, 48004), (440, 44731), (451, 43640), (820, 24002), (902, 21820), (1091, 18040), (1640, 12001), (1804, 10910), (2182, 9020), (2255, 8728), (3608, 5455), (4364, 4510)]