20656664

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 46602240

約数和(自身を除く): 25945576

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 73, 124, 146, 163, 217, 248, 292, 326, 434, 511, 584, 652, 868, 1022, 1141, 1304, 1736, 2044, 2263, 2282, 4088, 4526, 4564, 5053, 9052, 9128, 10106, 11899, 15841, 18104, 20212, 23798, 31682, 35371, 40424, 47596, 63364, 70742, 83293, 95192, 126728, 141484, 166586, 282968, 333172, 368869, 666344, 737738, 1475476, 2582083, 2950952, 5164166, 10328332, 20656664]

約数ペア:

[(1, 20656664), (2, 10328332), (4, 5164166), (7, 2950952), (8, 2582083), (14, 1475476), (28, 737738), (31, 666344), (56, 368869), (62, 333172), (73, 282968), (124, 166586), (146, 141484), (163, 126728), (217, 95192), (248, 83293), (292, 70742), (326, 63364), (434, 47596), (511, 40424), (584, 35371), (652, 31682), (868, 23798), (1022, 20212), (1141, 18104), (1304, 15841), (1736, 11899), (2044, 10106), (2263, 9128), (2282, 9052), (4088, 5053), (4526, 4564)]