28948220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:403

約数の個数: 72

約数和(自身を含む): 71628480

約数和(自身を除く): 42680260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 109, 140, 196, 218, 245, 271, 436, 490, 542, 545, 763, 980, 1084, 1090, 1355, 1526, 1897, 2180, 2710, 3052, 3794, 3815, 5341, 5420, 7588, 7630, 9485, 10682, 13279, 15260, 18970, 21364, 26558, 26705, 29539, 37940, 53116, 53410, 59078, 66395, 106820, 118156, 132790, 147695, 206773, 265580, 295390, 413546, 590780, 827092, 1033865, 1447411, 2067730, 2894822, 4135460, 5789644, 7237055, 14474110, 28948220]

約数ペア:

[(1, 28948220), (2, 14474110), (4, 7237055), (5, 5789644), (7, 4135460), (10, 2894822), (14, 2067730), (20, 1447411), (28, 1033865), (35, 827092), (49, 590780), (70, 413546), (98, 295390), (109, 265580), (140, 206773), (196, 147695), (218, 132790), (245, 118156), (271, 106820), (436, 66395), (490, 59078), (542, 53410), (545, 53116), (763, 37940), (980, 29539), (1084, 26705), (1090, 26558), (1355, 21364), (1526, 18970), (1897, 15260), (2180, 13279), (2710, 10682), (3052, 9485), (3794, 7630), (3815, 7588), (5341, 5420)]