28787990

素因数分解:

$2^1\times 5^1\times 7^4\times {\mathrm{11}}^1\times {\mathrm{109}}^1$

素因数の和:155

約数の個数: 80

約数和(自身を含む): 66551760

約数和(自身を除く): 37763770

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 109, 110, 154, 218, 245, 343, 385, 490, 539, 545, 686, 763, 770, 1078, 1090, 1199, 1526, 1715, 2398, 2401, 2695, 3430, 3773, 3815, 4802, 5341, 5390, 5995, 7546, 7630, 8393, 10682, 11990, 12005, 16786, 18865, 24010, 26411, 26705, 37387, 37730, 41965, 52822, 53410, 58751, 74774, 83930, 117502, 132055, 186935, 261709, 264110, 293755, 373870, 411257, 523418, 587510, 822514, 1308545, 2056285, 2617090, 2878799, 4112570, 5757598, 14393995, 28787990]

約数ペア:

[(1, 28787990), (2, 14393995), (5, 5757598), (7, 4112570), (10, 2878799), (11, 2617090), (14, 2056285), (22, 1308545), (35, 822514), (49, 587510), (55, 523418), (70, 411257), (77, 373870), (98, 293755), (109, 264110), (110, 261709), (154, 186935), (218, 132055), (245, 117502), (343, 83930), (385, 74774), (490, 58751), (539, 53410), (545, 52822), (686, 41965), (763, 37730), (770, 37387), (1078, 26705), (1090, 26411), (1199, 24010), (1526, 18865), (1715, 16786), (2398, 12005), (2401, 11990), (2695, 10682), (3430, 8393), (3773, 7630), (3815, 7546), (4802, 5995), (5341, 5390)]