21727745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 29804544

約数和(自身を除く): 8076799

約数列:

[1, 5, 13, 31, 41, 65, 155, 205, 263, 403, 533, 1271, 1315, 2015, 2665, 3419, 6355, 8153, 10783, 16523, 17095, 40765, 53915, 82615, 105989, 140179, 334273, 529945, 700895, 1671365, 4345549, 21727745]

約数ペア:

[(1, 21727745), (5, 4345549), (13, 1671365), (31, 700895), (41, 529945), (65, 334273), (155, 140179), (205, 105989), (263, 82615), (403, 53915), (533, 40765), (1271, 17095), (1315, 16523), (2015, 10783), (2665, 8153), (3419, 6355)]