28313840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 70709760

約数和(自身を除く): 42395920

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 109, 136, 170, 191, 218, 272, 340, 382, 436, 545, 680, 764, 872, 955, 1090, 1360, 1528, 1744, 1853, 1910, 2180, 3056, 3247, 3706, 3820, 4360, 6494, 7412, 7640, 8720, 9265, 12988, 14824, 15280, 16235, 18530, 20819, 25976, 29648, 32470, 37060, 41638, 51952, 64940, 74120, 83276, 104095, 129880, 148240, 166552, 208190, 259760, 333104, 353923, 416380, 707846, 832760, 1415692, 1665520, 1769615, 2831384, 3539230, 5662768, 7078460, 14156920, 28313840]

約数ペア:

[(1, 28313840), (2, 14156920), (4, 7078460), (5, 5662768), (8, 3539230), (10, 2831384), (16, 1769615), (17, 1665520), (20, 1415692), (34, 832760), (40, 707846), (68, 416380), (80, 353923), (85, 333104), (109, 259760), (136, 208190), (170, 166552), (191, 148240), (218, 129880), (272, 104095), (340, 83276), (382, 74120), (436, 64940), (545, 51952), (680, 41638), (764, 37060), (872, 32470), (955, 29648), (1090, 25976), (1360, 20819), (1528, 18530), (1744, 16235), (1853, 15280), (1910, 14824), (2180, 12988), (3056, 9265), (3247, 8720), (3706, 7640), (3820, 7412), (4360, 6494)]