21720924

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{709}}^1$

素因数の和:779

約数の個数: 72

約数和(自身を含む): 58924320

約数和(自身を除く): 37203396

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 37, 46, 69, 74, 92, 111, 138, 148, 207, 222, 276, 333, 414, 444, 666, 709, 828, 851, 1332, 1418, 1702, 2127, 2553, 2836, 3404, 4254, 5106, 6381, 7659, 8508, 10212, 12762, 15318, 16307, 25524, 26233, 30636, 32614, 48921, 52466, 65228, 78699, 97842, 104932, 146763, 157398, 195684, 236097, 293526, 314796, 472194, 587052, 603359, 944388, 1206718, 1810077, 2413436, 3620154, 5430231, 7240308, 10860462, 21720924]

約数ペア:

[(1, 21720924), (2, 10860462), (3, 7240308), (4, 5430231), (6, 3620154), (9, 2413436), (12, 1810077), (18, 1206718), (23, 944388), (36, 603359), (37, 587052), (46, 472194), (69, 314796), (74, 293526), (92, 236097), (111, 195684), (138, 157398), (148, 146763), (207, 104932), (222, 97842), (276, 78699), (333, 65228), (414, 52466), (444, 48921), (666, 32614), (709, 30636), (828, 26233), (851, 25524), (1332, 16307), (1418, 15318), (1702, 12762), (2127, 10212), (2553, 8508), (2836, 7659), (3404, 6381), (4254, 5106)]