20310680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{281}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 49744800

約数和(自身を除く): 29434120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 139, 260, 278, 281, 520, 556, 562, 695, 1112, 1124, 1390, 1405, 1807, 2248, 2780, 2810, 3614, 3653, 5560, 5620, 7228, 7306, 9035, 11240, 14456, 14612, 18070, 18265, 29224, 36140, 36530, 39059, 72280, 73060, 78118, 146120, 156236, 195295, 312472, 390590, 507767, 781180, 1015534, 1562360, 2031068, 2538835, 4062136, 5077670, 10155340, 20310680]

約数ペア:

[(1, 20310680), (2, 10155340), (4, 5077670), (5, 4062136), (8, 2538835), (10, 2031068), (13, 1562360), (20, 1015534), (26, 781180), (40, 507767), (52, 390590), (65, 312472), (104, 195295), (130, 156236), (139, 146120), (260, 78118), (278, 73060), (281, 72280), (520, 39059), (556, 36530), (562, 36140), (695, 29224), (1112, 18265), (1124, 18070), (1390, 14612), (1405, 14456), (1807, 11240), (2248, 9035), (2780, 7306), (2810, 7228), (3614, 5620), (3653, 5560)]