21696255

素因数分解:

$3^5\times 5^1\times 7^1\times {\mathrm{2551}}^1$

素因数の和:2578

約数の個数: 48

約数和(自身を含む): 44588544

約数和(自身を除く): 22892289

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 243, 315, 405, 567, 945, 1215, 1701, 2551, 2835, 7653, 8505, 12755, 17857, 22959, 38265, 53571, 68877, 89285, 114795, 160713, 206631, 267855, 344385, 482139, 619893, 803565, 1033155, 1446417, 2410695, 3099465, 4339251, 7232085, 21696255]

約数ペア:

[(1, 21696255), (3, 7232085), (5, 4339251), (7, 3099465), (9, 2410695), (15, 1446417), (21, 1033155), (27, 803565), (35, 619893), (45, 482139), (63, 344385), (81, 267855), (105, 206631), (135, 160713), (189, 114795), (243, 89285), (315, 68877), (405, 53571), (567, 38265), (945, 22959), (1215, 17857), (1701, 12755), (2551, 8505), (2835, 7653)]