20201090

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 45480960

約数和(自身を除く): 25279870

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 79, 91, 130, 158, 182, 281, 395, 455, 553, 562, 790, 910, 1027, 1106, 1405, 1967, 2054, 2765, 2810, 3653, 3934, 5135, 5530, 7189, 7306, 9835, 10270, 14378, 18265, 19670, 22199, 25571, 35945, 36530, 44398, 51142, 71890, 110995, 127855, 155393, 221990, 255710, 288587, 310786, 577174, 776965, 1442935, 1553930, 2020109, 2885870, 4040218, 10100545, 20201090]

約数ペア:

[(1, 20201090), (2, 10100545), (5, 4040218), (7, 2885870), (10, 2020109), (13, 1553930), (14, 1442935), (26, 776965), (35, 577174), (65, 310786), (70, 288587), (79, 255710), (91, 221990), (130, 155393), (158, 127855), (182, 110995), (281, 71890), (395, 51142), (455, 44398), (553, 36530), (562, 35945), (790, 25571), (910, 22199), (1027, 19670), (1106, 18265), (1405, 14378), (1967, 10270), (2054, 9835), (2765, 7306), (2810, 7189), (3653, 5530), (3934, 5135)]