21265215

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{937}}^1$

素因数の和:1051

約数の個数: 32

約数和(自身を含む): 36469440

約数和(自身を除く): 15204225

約数列:

[1, 3, 5, 15, 17, 51, 85, 89, 255, 267, 445, 937, 1335, 1513, 2811, 4539, 4685, 7565, 14055, 15929, 22695, 47787, 79645, 83393, 238935, 250179, 416965, 1250895, 1417681, 4253043, 7088405, 21265215]

約数ペア:

[(1, 21265215), (3, 7088405), (5, 4253043), (15, 1417681), (17, 1250895), (51, 416965), (85, 250179), (89, 238935), (255, 83393), (267, 79645), (445, 47787), (937, 22695), (1335, 15929), (1513, 14055), (2811, 7565), (4539, 4685)]