21706280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{233}}^1$

素因数の和:398

約数の個数: 64

約数和(自身を含む): 52313040

約数和(自身を除く): 30606760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 137, 170, 233, 274, 340, 466, 548, 680, 685, 932, 1096, 1165, 1370, 1864, 2329, 2330, 2740, 3961, 4658, 4660, 5480, 7922, 9316, 9320, 11645, 15844, 18632, 19805, 23290, 31688, 31921, 39610, 46580, 63842, 79220, 93160, 127684, 158440, 159605, 255368, 319210, 542657, 638420, 1085314, 1276840, 2170628, 2713285, 4341256, 5426570, 10853140, 21706280]

約数ペア:

[(1, 21706280), (2, 10853140), (4, 5426570), (5, 4341256), (8, 2713285), (10, 2170628), (17, 1276840), (20, 1085314), (34, 638420), (40, 542657), (68, 319210), (85, 255368), (136, 159605), (137, 158440), (170, 127684), (233, 93160), (274, 79220), (340, 63842), (466, 46580), (548, 39610), (680, 31921), (685, 31688), (932, 23290), (1096, 19805), (1165, 18632), (1370, 15844), (1864, 11645), (2329, 9320), (2330, 9316), (2740, 7922), (3961, 5480), (4658, 4660)]