20812155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{193}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 41717760

約数和(自身を除く): 20905605

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 79, 91, 105, 193, 195, 237, 273, 395, 455, 553, 579, 965, 1027, 1185, 1351, 1365, 1659, 2509, 2765, 2895, 3081, 4053, 5135, 6755, 7189, 7527, 8295, 12545, 15247, 15405, 17563, 20265, 21567, 35945, 37635, 45741, 52689, 76235, 87815, 106729, 107835, 198211, 228705, 263445, 320187, 533645, 594633, 991055, 1387477, 1600935, 2973165, 4162431, 6937385, 20812155]

約数ペア:

[(1, 20812155), (3, 6937385), (5, 4162431), (7, 2973165), (13, 1600935), (15, 1387477), (21, 991055), (35, 594633), (39, 533645), (65, 320187), (79, 263445), (91, 228705), (105, 198211), (193, 107835), (195, 106729), (237, 87815), (273, 76235), (395, 52689), (455, 45741), (553, 37635), (579, 35945), (965, 21567), (1027, 20265), (1185, 17563), (1351, 15405), (1365, 15247), (1659, 12545), (2509, 8295), (2765, 7527), (2895, 7189), (3081, 6755), (4053, 5135)]