221464840

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{33967}}^1$

素因数の和:34141

約数の個数: 32

約数和(自身を含む): 501367680

約数和(自身を除く): 279902840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 33967, 67934, 135868, 169835, 271736, 339670, 679340, 1358680, 5536621, 11073242, 22146484, 27683105, 44292968, 55366210, 110732420, 221464840]

約数ペア:

[(1, 221464840), (2, 110732420), (4, 55366210), (5, 44292968), (8, 27683105), (10, 22146484), (20, 11073242), (40, 5536621), (163, 1358680), (326, 679340), (652, 339670), (815, 271736), (1304, 169835), (1630, 135868), (3260, 67934), (6520, 33967)]