21328713

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 37113856

約数和(自身を除く): 15785143

約数列:

[1, 3, 7, 9, 21, 31, 63, 67, 93, 163, 201, 217, 279, 469, 489, 603, 651, 1141, 1407, 1467, 1953, 2077, 3423, 4221, 5053, 6231, 10269, 10921, 14539, 15159, 18693, 32763, 35371, 43617, 45477, 76447, 98289, 106113, 130851, 229341, 318339, 338551, 688023, 1015653, 2369857, 3046959, 7109571, 21328713]

約数ペア:

[(1, 21328713), (3, 7109571), (7, 3046959), (9, 2369857), (21, 1015653), (31, 688023), (63, 338551), (67, 318339), (93, 229341), (163, 130851), (201, 106113), (217, 98289), (279, 76447), (469, 45477), (489, 43617), (603, 35371), (651, 32763), (1141, 18693), (1407, 15159), (1467, 14539), (1953, 10921), (2077, 10269), (3423, 6231), (4221, 5053)]