20782580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{601}}^1$

素因数の和:649

約数の個数: 96

約数和(自身を含む): 56636160

約数和(自身を除く): 35853580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 26, 28, 35, 38, 52, 65, 70, 76, 91, 95, 130, 133, 140, 182, 190, 247, 260, 266, 364, 380, 455, 494, 532, 601, 665, 910, 988, 1202, 1235, 1330, 1729, 1820, 2404, 2470, 2660, 3005, 3458, 4207, 4940, 6010, 6916, 7813, 8414, 8645, 11419, 12020, 15626, 16828, 17290, 21035, 22838, 31252, 34580, 39065, 42070, 45676, 54691, 57095, 78130, 79933, 84140, 109382, 114190, 148447, 156260, 159866, 218764, 228380, 273455, 296894, 319732, 399665, 546910, 593788, 742235, 799330, 1039129, 1093820, 1484470, 1598660, 2078258, 2968940, 4156516, 5195645, 10391290, 20782580]

約数ペア:

[(1, 20782580), (2, 10391290), (4, 5195645), (5, 4156516), (7, 2968940), (10, 2078258), (13, 1598660), (14, 1484470), (19, 1093820), (20, 1039129), (26, 799330), (28, 742235), (35, 593788), (38, 546910), (52, 399665), (65, 319732), (70, 296894), (76, 273455), (91, 228380), (95, 218764), (130, 159866), (133, 156260), (140, 148447), (182, 114190), (190, 109382), (247, 84140), (260, 79933), (266, 78130), (364, 57095), (380, 54691), (455, 45676), (494, 42070), (532, 39065), (601, 34580), (665, 31252), (910, 22838), (988, 21035), (1202, 17290), (1235, 16828), (1330, 15626), (1729, 12020), (1820, 11419), (2404, 8645), (2470, 8414), (2660, 7813), (3005, 6916), (3458, 6010), (4207, 4940)]