20457585

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{337}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 37964160

約数和(自身を除く): 17506575

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 71, 95, 171, 213, 285, 337, 355, 639, 855, 1011, 1065, 1349, 1685, 3033, 3195, 4047, 5055, 6403, 6745, 12141, 15165, 19209, 20235, 23927, 32015, 57627, 60705, 71781, 96045, 119635, 215343, 288135, 358905, 454613, 1076715, 1363839, 2273065, 4091517, 6819195, 20457585]

約数ペア:

[(1, 20457585), (3, 6819195), (5, 4091517), (9, 2273065), (15, 1363839), (19, 1076715), (45, 454613), (57, 358905), (71, 288135), (95, 215343), (171, 119635), (213, 96045), (285, 71781), (337, 60705), (355, 57627), (639, 32015), (855, 23927), (1011, 20235), (1065, 19209), (1349, 15165), (1685, 12141), (3033, 6745), (3195, 6403), (4047, 5055)]