20704550

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:281

約数の個数: 48

約数和(自身を含む): 40510800

約数和(自身を除く): 19806250

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 109, 131, 145, 218, 262, 290, 545, 655, 725, 1090, 1310, 1450, 2725, 3161, 3275, 3799, 5450, 6322, 6550, 7598, 14279, 15805, 18995, 28558, 31610, 37990, 71395, 79025, 94975, 142790, 158050, 189950, 356975, 414091, 713950, 828182, 2070455, 4140910, 10352275, 20704550]

約数ペア:

[(1, 20704550), (2, 10352275), (5, 4140910), (10, 2070455), (25, 828182), (29, 713950), (50, 414091), (58, 356975), (109, 189950), (131, 158050), (145, 142790), (218, 94975), (262, 79025), (290, 71395), (545, 37990), (655, 31610), (725, 28558), (1090, 18995), (1310, 15805), (1450, 14279), (2725, 7598), (3161, 6550), (3275, 6322), (3799, 5450)]