28387700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 68058144

約数和(自身を除く): 39670444

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 131, 197, 220, 262, 275, 394, 524, 550, 655, 788, 985, 1100, 1310, 1441, 1970, 2167, 2620, 2882, 3275, 3940, 4334, 4925, 5764, 6550, 7205, 8668, 9850, 10835, 13100, 14410, 19700, 21670, 25807, 28820, 36025, 43340, 51614, 54175, 72050, 103228, 108350, 129035, 144100, 216700, 258070, 283877, 516140, 567754, 645175, 1135508, 1290350, 1419385, 2580700, 2838770, 5677540, 7096925, 14193850, 28387700]

約数ペア:

[(1, 28387700), (2, 14193850), (4, 7096925), (5, 5677540), (10, 2838770), (11, 2580700), (20, 1419385), (22, 1290350), (25, 1135508), (44, 645175), (50, 567754), (55, 516140), (100, 283877), (110, 258070), (131, 216700), (197, 144100), (220, 129035), (262, 108350), (275, 103228), (394, 72050), (524, 54175), (550, 51614), (655, 43340), (788, 36025), (985, 28820), (1100, 25807), (1310, 21670), (1441, 19700), (1970, 14410), (2167, 13100), (2620, 10835), (2882, 9850), (3275, 8668), (3940, 7205), (4334, 6550), (4925, 5764)]