278788180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{349}}^1\times {\mathrm{3631}}^1$

素因数の和:4000

約数の個数: 48

約数和(自身を含む): 640684800

約数和(自身を除く): 361896620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 349, 698, 1396, 1745, 3490, 3631, 3839, 6980, 7262, 7678, 14524, 15356, 18155, 19195, 36310, 38390, 39941, 72620, 76780, 79882, 159764, 199705, 399410, 798820, 1267219, 2534438, 5068876, 6336095, 12672190, 13939409, 25344380, 27878818, 55757636, 69697045, 139394090, 278788180]

約数ペア:

[(1, 278788180), (2, 139394090), (4, 69697045), (5, 55757636), (10, 27878818), (11, 25344380), (20, 13939409), (22, 12672190), (44, 6336095), (55, 5068876), (110, 2534438), (220, 1267219), (349, 798820), (698, 399410), (1396, 199705), (1745, 159764), (3490, 79882), (3631, 76780), (3839, 72620), (6980, 39941), (7262, 38390), (7678, 36310), (14524, 19195), (15356, 18155)]