20845880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 53146800

約数和(自身を除く): 32300920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 59, 73, 88, 110, 118, 121, 146, 220, 236, 242, 292, 295, 365, 440, 472, 484, 584, 590, 605, 649, 730, 803, 968, 1180, 1210, 1298, 1460, 1606, 2360, 2420, 2596, 2920, 3212, 3245, 4015, 4307, 4840, 5192, 6424, 6490, 7139, 8030, 8614, 8833, 12980, 14278, 16060, 17228, 17666, 21535, 25960, 28556, 32120, 34456, 35332, 35695, 43070, 44165, 47377, 57112, 70664, 71390, 86140, 88330, 94754, 142780, 172280, 176660, 189508, 236885, 285560, 353320, 379016, 473770, 521147, 947540, 1042294, 1895080, 2084588, 2605735, 4169176, 5211470, 10422940, 20845880]

約数ペア:

[(1, 20845880), (2, 10422940), (4, 5211470), (5, 4169176), (8, 2605735), (10, 2084588), (11, 1895080), (20, 1042294), (22, 947540), (40, 521147), (44, 473770), (55, 379016), (59, 353320), (73, 285560), (88, 236885), (110, 189508), (118, 176660), (121, 172280), (146, 142780), (220, 94754), (236, 88330), (242, 86140), (292, 71390), (295, 70664), (365, 57112), (440, 47377), (472, 44165), (484, 43070), (584, 35695), (590, 35332), (605, 34456), (649, 32120), (730, 28556), (803, 25960), (968, 21535), (1180, 17666), (1210, 17228), (1298, 16060), (1460, 14278), (1606, 12980), (2360, 8833), (2420, 8614), (2596, 8030), (2920, 7139), (3212, 6490), (3245, 6424), (4015, 5192), (4307, 4840)]