21143955

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2549}}^1$

素因数の和:2643

約数の個数: 32

約数和(自身を含む): 39168000

約数和(自身を除く): 18024045

約数列:

[1, 3, 5, 7, 15, 21, 35, 79, 105, 237, 395, 553, 1185, 1659, 2549, 2765, 7647, 8295, 12745, 17843, 38235, 53529, 89215, 201371, 267645, 604113, 1006855, 1409597, 3020565, 4228791, 7047985, 21143955]

約数ペア:

[(1, 21143955), (3, 7047985), (5, 4228791), (7, 3020565), (15, 1409597), (21, 1006855), (35, 604113), (79, 267645), (105, 201371), (237, 89215), (395, 53529), (553, 38235), (1185, 17843), (1659, 12745), (2549, 8295), (2765, 7647)]