28485880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 68545440

約数和(自身を除く): 40059560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 163, 170, 257, 326, 340, 514, 652, 680, 815, 1028, 1285, 1304, 1630, 2056, 2570, 2771, 3260, 4369, 5140, 5542, 6520, 8738, 10280, 11084, 13855, 17476, 21845, 22168, 27710, 34952, 41891, 43690, 55420, 83782, 87380, 110840, 167564, 174760, 209455, 335128, 418910, 712147, 837820, 1424294, 1675640, 2848588, 3560735, 5697176, 7121470, 14242940, 28485880]

約数ペア:

[(1, 28485880), (2, 14242940), (4, 7121470), (5, 5697176), (8, 3560735), (10, 2848588), (17, 1675640), (20, 1424294), (34, 837820), (40, 712147), (68, 418910), (85, 335128), (136, 209455), (163, 174760), (170, 167564), (257, 110840), (326, 87380), (340, 83782), (514, 55420), (652, 43690), (680, 41891), (815, 34952), (1028, 27710), (1285, 22168), (1304, 21845), (1630, 17476), (2056, 13855), (2570, 11084), (2771, 10280), (3260, 8738), (4369, 6520), (5140, 5542)]