21777440

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1039}}^1$

素因数の和:1185

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30114400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 1039, 1048, 1310, 2078, 2096, 2620, 4156, 4192, 5195, 5240, 8312, 10390, 10480, 16624, 20780, 20960, 33248, 41560, 83120, 136109, 166240, 272218, 544436, 680545, 1088872, 1361090, 2177744, 2722180, 4355488, 5444360, 10888720, 21777440]

約数ペア:

[(1, 21777440), (2, 10888720), (4, 5444360), (5, 4355488), (8, 2722180), (10, 2177744), (16, 1361090), (20, 1088872), (32, 680545), (40, 544436), (80, 272218), (131, 166240), (160, 136109), (262, 83120), (524, 41560), (655, 33248), (1039, 20960), (1048, 20780), (1310, 16624), (2078, 10480), (2096, 10390), (2620, 8312), (4156, 5240), (4192, 5195)]