18971420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{557}}^1$

素因数の和:710

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 24338308

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 557, 655, 1114, 1310, 1703, 2228, 2620, 2785, 3406, 5570, 6812, 7241, 8515, 11140, 14482, 17030, 28964, 34060, 36205, 72410, 72967, 144820, 145934, 291868, 364835, 729670, 948571, 1459340, 1897142, 3794284, 4742855, 9485710, 18971420]

約数ペア:

[(1, 18971420), (2, 9485710), (4, 4742855), (5, 3794284), (10, 1897142), (13, 1459340), (20, 948571), (26, 729670), (52, 364835), (65, 291868), (130, 145934), (131, 144820), (260, 72967), (262, 72410), (524, 36205), (557, 34060), (655, 28964), (1114, 17030), (1310, 14482), (1703, 11140), (2228, 8515), (2620, 7241), (2785, 6812), (3406, 5570)]