18943015

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:152

約数の個数: 64

約数和(自身を含む): 30965760

約数和(自身を除く): 12022745

約数列:

[1, 5, 7, 13, 17, 31, 35, 65, 79, 85, 91, 119, 155, 217, 221, 395, 403, 455, 527, 553, 595, 1027, 1085, 1105, 1343, 1547, 2015, 2449, 2635, 2765, 2821, 3689, 5135, 6715, 6851, 7189, 7735, 9401, 12245, 14105, 17143, 17459, 18445, 31837, 34255, 35945, 41633, 47005, 47957, 85715, 87295, 122213, 159185, 208165, 222859, 239785, 291431, 541229, 611065, 1114295, 1457155, 2706145, 3788603, 18943015]

約数ペア:

[(1, 18943015), (5, 3788603), (7, 2706145), (13, 1457155), (17, 1114295), (31, 611065), (35, 541229), (65, 291431), (79, 239785), (85, 222859), (91, 208165), (119, 159185), (155, 122213), (217, 87295), (221, 85715), (395, 47957), (403, 47005), (455, 41633), (527, 35945), (553, 34255), (595, 31837), (1027, 18445), (1085, 17459), (1105, 17143), (1343, 14105), (1547, 12245), (2015, 9401), (2449, 7735), (2635, 7189), (2765, 6851), (2821, 6715), (3689, 5135)]