21009765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2741}}^1$

素因数の和:2829

約数の個数: 32

約数和(自身を含む): 38958336

約数和(自身を除く): 17948571

約数列:

[1, 3, 5, 7, 15, 21, 35, 73, 105, 219, 365, 511, 1095, 1533, 2555, 2741, 7665, 8223, 13705, 19187, 41115, 57561, 95935, 200093, 287805, 600279, 1000465, 1400651, 3001395, 4201953, 7003255, 21009765]

約数ペア:

[(1, 21009765), (3, 7003255), (5, 4201953), (7, 3001395), (15, 1400651), (21, 1000465), (35, 600279), (73, 287805), (105, 200093), (219, 95935), (365, 57561), (511, 41115), (1095, 19187), (1533, 13705), (2555, 8223), (2741, 7665)]