20555780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 52496640

約数和(自身を除く): 31940860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 61, 70, 83, 116, 122, 140, 145, 166, 203, 244, 290, 305, 332, 406, 415, 427, 580, 581, 610, 812, 830, 854, 1015, 1162, 1220, 1660, 1708, 1769, 2030, 2135, 2324, 2407, 2905, 3538, 4060, 4270, 4814, 5063, 5810, 7076, 8540, 8845, 9628, 10126, 11620, 12035, 12383, 16849, 17690, 20252, 24070, 24766, 25315, 33698, 35380, 35441, 48140, 49532, 50630, 61915, 67396, 70882, 84245, 101260, 123830, 141764, 146827, 168490, 177205, 247660, 293654, 336980, 354410, 587308, 708820, 734135, 1027789, 1468270, 2055578, 2936540, 4111156, 5138945, 10277890, 20555780]

約数ペア:

[(1, 20555780), (2, 10277890), (4, 5138945), (5, 4111156), (7, 2936540), (10, 2055578), (14, 1468270), (20, 1027789), (28, 734135), (29, 708820), (35, 587308), (58, 354410), (61, 336980), (70, 293654), (83, 247660), (116, 177205), (122, 168490), (140, 146827), (145, 141764), (166, 123830), (203, 101260), (244, 84245), (290, 70882), (305, 67396), (332, 61915), (406, 50630), (415, 49532), (427, 48140), (580, 35441), (581, 35380), (610, 33698), (812, 25315), (830, 24766), (854, 24070), (1015, 20252), (1162, 17690), (1220, 16849), (1660, 12383), (1708, 12035), (1769, 11620), (2030, 10126), (2135, 9628), (2324, 8845), (2407, 8540), (2905, 7076), (3538, 5810), (4060, 5063), (4270, 4814)]