21074325

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{643}}^1$

素因数の和:698

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 17256555

約数列:

[1, 3, 5, 15, 19, 23, 25, 57, 69, 75, 95, 115, 285, 345, 437, 475, 575, 643, 1311, 1425, 1725, 1929, 2185, 3215, 6555, 9645, 10925, 12217, 14789, 16075, 32775, 36651, 44367, 48225, 61085, 73945, 183255, 221835, 280991, 305425, 369725, 842973, 916275, 1109175, 1404955, 4214865, 7024775, 21074325]

約数ペア:

[(1, 21074325), (3, 7024775), (5, 4214865), (15, 1404955), (19, 1109175), (23, 916275), (25, 842973), (57, 369725), (69, 305425), (75, 280991), (95, 221835), (115, 183255), (285, 73945), (345, 61085), (437, 48225), (475, 44367), (575, 36651), (643, 32775), (1311, 16075), (1425, 14789), (1725, 12217), (1929, 10925), (2185, 9645), (3215, 6555)]