28187500

素因数分解:

$2^2\times 5^6\times {\mathrm{11}}^1\times {\mathrm{41}}^1$

素因数の和:86

約数の個数: 84

約数和(自身を含む): 68905368

約数和(自身を除く): 40717868

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 125, 164, 205, 220, 250, 275, 410, 451, 500, 550, 625, 820, 902, 1025, 1100, 1250, 1375, 1804, 2050, 2255, 2500, 2750, 3125, 4100, 4510, 5125, 5500, 6250, 6875, 9020, 10250, 11275, 12500, 13750, 15625, 20500, 22550, 25625, 27500, 31250, 34375, 45100, 51250, 56375, 62500, 68750, 102500, 112750, 128125, 137500, 171875, 225500, 256250, 281875, 343750, 512500, 563750, 640625, 687500, 1127500, 1281250, 1409375, 2562500, 2818750, 5637500, 7046875, 14093750, 28187500]

約数ペア:

[(1, 28187500), (2, 14093750), (4, 7046875), (5, 5637500), (10, 2818750), (11, 2562500), (20, 1409375), (22, 1281250), (25, 1127500), (41, 687500), (44, 640625), (50, 563750), (55, 512500), (82, 343750), (100, 281875), (110, 256250), (125, 225500), (164, 171875), (205, 137500), (220, 128125), (250, 112750), (275, 102500), (410, 68750), (451, 62500), (500, 56375), (550, 51250), (625, 45100), (820, 34375), (902, 31250), (1025, 27500), (1100, 25625), (1250, 22550), (1375, 20500), (1804, 15625), (2050, 13750), (2255, 12500), (2500, 11275), (2750, 10250), (3125, 9020), (4100, 6875), (4510, 6250), (5125, 5500)]