21815792

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{857}}^1$

素因数の和:945

約数の個数: 40

約数和(自身を含む): 44471856

約数和(自身を除く): 22656064

約数列:

[1, 2, 4, 8, 16, 37, 43, 74, 86, 148, 172, 296, 344, 592, 688, 857, 1591, 1714, 3182, 3428, 6364, 6856, 12728, 13712, 25456, 31709, 36851, 63418, 73702, 126836, 147404, 253672, 294808, 507344, 589616, 1363487, 2726974, 5453948, 10907896, 21815792]

約数ペア:

[(1, 21815792), (2, 10907896), (4, 5453948), (8, 2726974), (16, 1363487), (37, 589616), (43, 507344), (74, 294808), (86, 253672), (148, 147404), (172, 126836), (296, 73702), (344, 63418), (592, 36851), (688, 31709), (857, 25456), (1591, 13712), (1714, 12728), (3182, 6856), (3428, 6364)]