21503902

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:532

約数の個数: 32

約数和(自身を含む): 38169792

約数和(自身を除く): 16665890

約数列:

[1, 2, 7, 14, 53, 73, 106, 146, 371, 397, 511, 742, 794, 1022, 2779, 3869, 5558, 7738, 21041, 27083, 28981, 42082, 54166, 57962, 147287, 202867, 294574, 405734, 1535993, 3071986, 10751951, 21503902]

約数ペア:

[(1, 21503902), (2, 10751951), (7, 3071986), (14, 1535993), (53, 405734), (73, 294574), (106, 202867), (146, 147287), (371, 57962), (397, 54166), (511, 42082), (742, 28981), (794, 27083), (1022, 21041), (2779, 7738), (3869, 5558)]