20500980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:329

約数の個数: 96

約数和(自身を含む): 61689600

約数和(自身を除く): 41188620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 101, 102, 170, 199, 202, 204, 255, 303, 340, 398, 404, 505, 510, 597, 606, 796, 995, 1010, 1020, 1194, 1212, 1515, 1717, 1990, 2020, 2388, 2985, 3030, 3383, 3434, 3980, 5151, 5970, 6060, 6766, 6868, 8585, 10149, 10302, 11940, 13532, 16915, 17170, 20099, 20298, 20604, 25755, 33830, 34340, 40198, 40596, 50745, 51510, 60297, 67660, 80396, 100495, 101490, 103020, 120594, 200990, 202980, 241188, 301485, 341683, 401980, 602970, 683366, 1025049, 1205940, 1366732, 1708415, 2050098, 3416830, 4100196, 5125245, 6833660, 10250490, 20500980]

約数ペア:

[(1, 20500980), (2, 10250490), (3, 6833660), (4, 5125245), (5, 4100196), (6, 3416830), (10, 2050098), (12, 1708415), (15, 1366732), (17, 1205940), (20, 1025049), (30, 683366), (34, 602970), (51, 401980), (60, 341683), (68, 301485), (85, 241188), (101, 202980), (102, 200990), (170, 120594), (199, 103020), (202, 101490), (204, 100495), (255, 80396), (303, 67660), (340, 60297), (398, 51510), (404, 50745), (505, 40596), (510, 40198), (597, 34340), (606, 33830), (796, 25755), (995, 20604), (1010, 20298), (1020, 20099), (1194, 17170), (1212, 16915), (1515, 13532), (1717, 11940), (1990, 10302), (2020, 10149), (2388, 8585), (2985, 6868), (3030, 6766), (3383, 6060), (3434, 5970), (3980, 5151)]