20902360

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3989}}^1$

素因数の和:4131

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26498840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3989, 5240, 7978, 15956, 19945, 31912, 39890, 79780, 159560, 522559, 1045118, 2090236, 2612795, 4180472, 5225590, 10451180, 20902360]

約数ペア:

[(1, 20902360), (2, 10451180), (4, 5225590), (5, 4180472), (8, 2612795), (10, 2090236), (20, 1045118), (40, 522559), (131, 159560), (262, 79780), (524, 39890), (655, 31912), (1048, 19945), (1310, 15956), (2620, 7978), (3989, 5240)]