28484860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{421}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 63806400

約数和(自身を除く): 35321540

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 199, 340, 398, 421, 796, 842, 995, 1684, 1990, 2105, 3383, 3980, 4210, 6766, 7157, 8420, 13532, 14314, 16915, 28628, 33830, 35785, 67660, 71570, 83779, 143140, 167558, 335116, 418895, 837790, 1424243, 1675580, 2848486, 5696972, 7121215, 14242430, 28484860]

約数ペア:

[(1, 28484860), (2, 14242430), (4, 7121215), (5, 5696972), (10, 2848486), (17, 1675580), (20, 1424243), (34, 837790), (68, 418895), (85, 335116), (170, 167558), (199, 143140), (340, 83779), (398, 71570), (421, 67660), (796, 35785), (842, 33830), (995, 28628), (1684, 16915), (1990, 14314), (2105, 13532), (3383, 8420), (3980, 7157), (4210, 6766)]