21139365

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 37946880

約数和(自身を除く): 16807515

約数列:

[1, 3, 5, 13, 15, 31, 39, 65, 93, 155, 169, 195, 269, 403, 465, 507, 807, 845, 1209, 1345, 2015, 2535, 3497, 4035, 5239, 6045, 8339, 10491, 15717, 17485, 25017, 26195, 41695, 45461, 52455, 78585, 108407, 125085, 136383, 227305, 325221, 542035, 681915, 1409291, 1626105, 4227873, 7046455, 21139365]

約数ペア:

[(1, 21139365), (3, 7046455), (5, 4227873), (13, 1626105), (15, 1409291), (31, 681915), (39, 542035), (65, 325221), (93, 227305), (155, 136383), (169, 125085), (195, 108407), (269, 78585), (403, 52455), (465, 45461), (507, 41695), (807, 26195), (845, 25017), (1209, 17485), (1345, 15717), (2015, 10491), (2535, 8339), (3497, 6045), (4035, 5239)]