20900061

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^3\times {\mathrm{151}}^1$

素因数の和:203

約数の個数: 48

約数和(自身を含む): 37623040

約数和(自身を除く): 16722979

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 151, 169, 273, 453, 507, 819, 1057, 1183, 1359, 1521, 1963, 2197, 3171, 3549, 5889, 6591, 9513, 10647, 13741, 15379, 17667, 19773, 25519, 41223, 46137, 76557, 123669, 138411, 178633, 229671, 331747, 535899, 995241, 1607697, 2322229, 2985723, 6966687, 20900061]

約数ペア:

[(1, 20900061), (3, 6966687), (7, 2985723), (9, 2322229), (13, 1607697), (21, 995241), (39, 535899), (63, 331747), (91, 229671), (117, 178633), (151, 138411), (169, 123669), (273, 76557), (453, 46137), (507, 41223), (819, 25519), (1057, 19773), (1183, 17667), (1359, 15379), (1521, 13741), (1963, 10647), (2197, 9513), (3171, 6591), (3549, 5889)]