219778840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{421}}^2$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 511669440

約数和(自身を除く): 291890600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 421, 620, 842, 1240, 1684, 2105, 3368, 4210, 8420, 13051, 16840, 26102, 52204, 65255, 104408, 130510, 177241, 261020, 354482, 522040, 708964, 886205, 1417928, 1772410, 3544820, 5494471, 7089640, 10988942, 21977884, 27472355, 43955768, 54944710, 109889420, 219778840]

約数ペア:

[(1, 219778840), (2, 109889420), (4, 54944710), (5, 43955768), (8, 27472355), (10, 21977884), (20, 10988942), (31, 7089640), (40, 5494471), (62, 3544820), (124, 1772410), (155, 1417928), (248, 886205), (310, 708964), (421, 522040), (620, 354482), (842, 261020), (1240, 177241), (1684, 130510), (2105, 104408), (3368, 65255), (4210, 52204), (8420, 26102), (13051, 16840)]