18972765

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1181}}^1$

素因数の和:1219

約数の個数: 64

約数和(自身を含む): 40849920

約数和(自身を除く): 21877155

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 85, 105, 119, 135, 153, 189, 255, 315, 357, 459, 595, 765, 945, 1071, 1181, 1785, 2295, 3213, 3543, 5355, 5905, 8267, 10629, 16065, 17715, 20077, 24801, 31887, 41335, 53145, 60231, 74403, 100385, 124005, 140539, 159435, 180693, 223209, 301155, 372015, 421617, 542079, 702695, 903465, 1116045, 1264851, 2108085, 2710395, 3794553, 6324255, 18972765]

約数ペア:

[(1, 18972765), (3, 6324255), (5, 3794553), (7, 2710395), (9, 2108085), (15, 1264851), (17, 1116045), (21, 903465), (27, 702695), (35, 542079), (45, 421617), (51, 372015), (63, 301155), (85, 223209), (105, 180693), (119, 159435), (135, 140539), (153, 124005), (189, 100385), (255, 74403), (315, 60231), (357, 53145), (459, 41335), (595, 31887), (765, 24801), (945, 20077), (1071, 17715), (1181, 16065), (1785, 10629), (2295, 8267), (3213, 5905), (3543, 5355)]