21913983

素因数分解:

$3^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{991}}^1$

素因数の和:1026

約数の個数: 48

約数和(自身を含む): 40441856

約数和(自身を除く): 18527873

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 243, 273, 351, 567, 819, 991, 1053, 1701, 2457, 2973, 3159, 6937, 7371, 8919, 12883, 20811, 22113, 26757, 38649, 62433, 80271, 90181, 115947, 187299, 240813, 270543, 347841, 561897, 811629, 1043523, 1685691, 2434887, 3130569, 7304661, 21913983]

約数ペア:

[(1, 21913983), (3, 7304661), (7, 3130569), (9, 2434887), (13, 1685691), (21, 1043523), (27, 811629), (39, 561897), (63, 347841), (81, 270543), (91, 240813), (117, 187299), (189, 115947), (243, 90181), (273, 80271), (351, 62433), (567, 38649), (819, 26757), (991, 22113), (1053, 20811), (1701, 12883), (2457, 8919), (2973, 7371), (3159, 6937)]