20849921415

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{18077}}^1$

素因数の和:18197

約数の個数: 72

約数和(自身を含む): 38681424288

約数和(自身を除く): 17831502873

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 71, 95, 171, 213, 285, 355, 361, 639, 855, 1065, 1083, 1349, 1805, 3195, 3249, 4047, 5415, 6745, 12141, 16245, 18077, 20235, 25631, 54231, 60705, 76893, 90385, 128155, 162693, 230679, 271155, 343463, 384465, 813465, 1030389, 1153395, 1283467, 1717315, 3091167, 3850401, 5151945, 6417335, 6525797, 11551203, 15455835, 19252005, 19577391, 24385873, 32628985, 57756015, 58732173, 73157619, 97886955, 121929365, 219472857, 293660865, 365788095, 463331587, 1097364285, 1389994761, 2316657935, 4169984283, 6949973805, 20849921415]

約数ペア:

[(1, 20849921415), (3, 6949973805), (5, 4169984283), (9, 2316657935), (15, 1389994761), (19, 1097364285), (45, 463331587), (57, 365788095), (71, 293660865), (95, 219472857), (171, 121929365), (213, 97886955), (285, 73157619), (355, 58732173), (361, 57756015), (639, 32628985), (855, 24385873), (1065, 19577391), (1083, 19252005), (1349, 15455835), (1805, 11551203), (3195, 6525797), (3249, 6417335), (4047, 5151945), (5415, 3850401), (6745, 3091167), (12141, 1717315), (16245, 1283467), (18077, 1153395), (20235, 1030389), (25631, 813465), (54231, 384465), (60705, 343463), (76893, 271155), (90385, 230679), (128155, 162693)]