20181616520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{546631}}^1$

素因数の和:546726

約数の個数: 64

約数和(自身を含む): 49590455040

約数和(自身を除く): 29408838520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 71, 104, 130, 142, 260, 284, 355, 520, 568, 710, 923, 1420, 1846, 2840, 3692, 4615, 7384, 9230, 18460, 36920, 546631, 1093262, 2186524, 2733155, 4373048, 5466310, 7106203, 10932620, 14212406, 21865240, 28424812, 35531015, 38810801, 56849624, 71062030, 77621602, 142124060, 155243204, 194054005, 284248120, 310486408, 388108010, 504540413, 776216020, 1009080826, 1552432040, 2018161652, 2522702065, 4036323304, 5045404130, 10090808260, 20181616520]

約数ペア:

[(1, 20181616520), (2, 10090808260), (4, 5045404130), (5, 4036323304), (8, 2522702065), (10, 2018161652), (13, 1552432040), (20, 1009080826), (26, 776216020), (40, 504540413), (52, 388108010), (65, 310486408), (71, 284248120), (104, 194054005), (130, 155243204), (142, 142124060), (260, 77621602), (284, 71062030), (355, 56849624), (520, 38810801), (568, 35531015), (710, 28424812), (923, 21865240), (1420, 14212406), (1846, 10932620), (2840, 7106203), (3692, 5466310), (4615, 4373048), (7384, 2733155), (9230, 2186524), (18460, 1093262), (36920, 546631)]