20545880

素因数分解:

$2^3\times 5^1\times {\mathrm{229}}^1\times {\mathrm{2243}}^1$

素因数の和:2483

約数の個数: 32

約数和(自身を含む): 46450800

約数和(自身を除く): 25904920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 229, 458, 916, 1145, 1832, 2243, 2290, 4486, 4580, 8972, 9160, 11215, 17944, 22430, 44860, 89720, 513647, 1027294, 2054588, 2568235, 4109176, 5136470, 10272940, 20545880]

約数ペア:

[(1, 20545880), (2, 10272940), (4, 5136470), (5, 4109176), (8, 2568235), (10, 2054588), (20, 1027294), (40, 513647), (229, 89720), (458, 44860), (916, 22430), (1145, 17944), (1832, 11215), (2243, 9160), (2290, 8972), (4486, 4580)]