20826715

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{503}}^1$

素因数の和:548

約数の個数: 36

約数和(自身を含む): 31543344

約数和(自身を除く): 10716629

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 169, 245, 455, 503, 637, 845, 1183, 2515, 3185, 3521, 5915, 6539, 8281, 17605, 24647, 32695, 41405, 45773, 85007, 123235, 228865, 320411, 425035, 595049, 1602055, 2975245, 4165343, 20826715]

約数ペア:

[(1, 20826715), (5, 4165343), (7, 2975245), (13, 1602055), (35, 595049), (49, 425035), (65, 320411), (91, 228865), (169, 123235), (245, 85007), (455, 45773), (503, 41405), (637, 32695), (845, 24647), (1183, 17605), (2515, 8281), (3185, 6539), (3521, 5915)]