20817615

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 41674752

約数和(自身を除く): 20857137

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 101, 105, 151, 195, 273, 303, 453, 455, 505, 707, 755, 1057, 1313, 1365, 1515, 1963, 2121, 2265, 3171, 3535, 3939, 5285, 5889, 6565, 9191, 9815, 10605, 13741, 15251, 15855, 19695, 27573, 29445, 41223, 45753, 45955, 68705, 76255, 106757, 137865, 198263, 206115, 228765, 320271, 533785, 594789, 991315, 1387841, 1601355, 2973945, 4163523, 6939205, 20817615]

約数ペア:

[(1, 20817615), (3, 6939205), (5, 4163523), (7, 2973945), (13, 1601355), (15, 1387841), (21, 991315), (35, 594789), (39, 533785), (65, 320271), (91, 228765), (101, 206115), (105, 198263), (151, 137865), (195, 106757), (273, 76255), (303, 68705), (453, 45955), (455, 45753), (505, 41223), (707, 29445), (755, 27573), (1057, 19695), (1313, 15855), (1365, 15251), (1515, 13741), (1963, 10605), (2121, 9815), (2265, 9191), (3171, 6565), (3535, 5889), (3939, 5285)]