20988540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^3$

素因数の和:89

約数の個数: 144

約数和(自身を含む): 71154720

約数和(自身を除く): 50166180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 19, 20, 30, 34, 36, 38, 45, 51, 57, 60, 68, 76, 85, 90, 95, 102, 114, 153, 170, 171, 180, 190, 204, 228, 255, 285, 306, 323, 340, 342, 361, 380, 510, 570, 612, 646, 684, 722, 765, 855, 969, 1020, 1083, 1140, 1292, 1444, 1530, 1615, 1710, 1805, 1938, 2166, 2907, 3060, 3230, 3249, 3420, 3610, 3876, 4332, 4845, 5415, 5814, 6137, 6460, 6498, 6859, 7220, 9690, 10830, 11628, 12274, 12996, 13718, 14535, 16245, 18411, 19380, 20577, 21660, 24548, 27436, 29070, 30685, 32490, 34295, 36822, 41154, 55233, 58140, 61370, 61731, 64980, 68590, 73644, 82308, 92055, 102885, 110466, 116603, 122740, 123462, 137180, 184110, 205770, 220932, 233206, 246924, 276165, 308655, 349809, 368220, 411540, 466412, 552330, 583015, 617310, 699618, 1049427, 1104660, 1166030, 1234620, 1399236, 1749045, 2098854, 2332060, 3498090, 4197708, 5247135, 6996180, 10494270, 20988540]

約数ペア:

[(1, 20988540), (2, 10494270), (3, 6996180), (4, 5247135), (5, 4197708), (6, 3498090), (9, 2332060), (10, 2098854), (12, 1749045), (15, 1399236), (17, 1234620), (18, 1166030), (19, 1104660), (20, 1049427), (30, 699618), (34, 617310), (36, 583015), (38, 552330), (45, 466412), (51, 411540), (57, 368220), (60, 349809), (68, 308655), (76, 276165), (85, 246924), (90, 233206), (95, 220932), (102, 205770), (114, 184110), (153, 137180), (170, 123462), (171, 122740), (180, 116603), (190, 110466), (204, 102885), (228, 92055), (255, 82308), (285, 73644), (306, 68590), (323, 64980), (340, 61731), (342, 61370), (361, 58140), (380, 55233), (510, 41154), (570, 36822), (612, 34295), (646, 32490), (684, 30685), (722, 29070), (765, 27436), (855, 24548), (969, 21660), (1020, 20577), (1083, 19380), (1140, 18411), (1292, 16245), (1444, 14535), (1530, 13718), (1615, 12996), (1710, 12274), (1805, 11628), (1938, 10830), (2166, 9690), (2907, 7220), (3060, 6859), (3230, 6498), (3249, 6460), (3420, 6137), (3610, 5814), (3876, 5415), (4332, 4845)]