20345940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:202

約数の個数: 144

約数和(自身を含む): 67026960

約数和(自身を除く): 46681020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 61, 68, 85, 90, 102, 109, 122, 153, 170, 180, 183, 204, 218, 244, 255, 305, 306, 327, 340, 366, 436, 510, 545, 549, 610, 612, 654, 732, 765, 915, 981, 1020, 1037, 1090, 1098, 1220, 1308, 1530, 1635, 1830, 1853, 1962, 2074, 2180, 2196, 2745, 3060, 3111, 3270, 3660, 3706, 3924, 4148, 4905, 5185, 5490, 5559, 6222, 6540, 6649, 7412, 9265, 9333, 9810, 10370, 10980, 11118, 12444, 13298, 15555, 16677, 18530, 18666, 19620, 19947, 20740, 22236, 26596, 27795, 31110, 33245, 33354, 37060, 37332, 39894, 46665, 55590, 59841, 62220, 66490, 66708, 79788, 83385, 93330, 99735, 111180, 113033, 119682, 132980, 166770, 186660, 199470, 226066, 239364, 299205, 333540, 339099, 398940, 452132, 565165, 598410, 678198, 1017297, 1130330, 1196820, 1356396, 1695495, 2034594, 2260660, 3390990, 4069188, 5086485, 6781980, 10172970, 20345940]

約数ペア:

[(1, 20345940), (2, 10172970), (3, 6781980), (4, 5086485), (5, 4069188), (6, 3390990), (9, 2260660), (10, 2034594), (12, 1695495), (15, 1356396), (17, 1196820), (18, 1130330), (20, 1017297), (30, 678198), (34, 598410), (36, 565165), (45, 452132), (51, 398940), (60, 339099), (61, 333540), (68, 299205), (85, 239364), (90, 226066), (102, 199470), (109, 186660), (122, 166770), (153, 132980), (170, 119682), (180, 113033), (183, 111180), (204, 99735), (218, 93330), (244, 83385), (255, 79788), (305, 66708), (306, 66490), (327, 62220), (340, 59841), (366, 55590), (436, 46665), (510, 39894), (545, 37332), (549, 37060), (610, 33354), (612, 33245), (654, 31110), (732, 27795), (765, 26596), (915, 22236), (981, 20740), (1020, 19947), (1037, 19620), (1090, 18666), (1098, 18530), (1220, 16677), (1308, 15555), (1530, 13298), (1635, 12444), (1830, 11118), (1853, 10980), (1962, 10370), (2074, 9810), (2180, 9333), (2196, 9265), (2745, 7412), (3060, 6649), (3111, 6540), (3270, 6222), (3660, 5559), (3706, 5490), (3924, 5185), (4148, 4905)]