20787780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{919}}^1$

素因数の和:973

約数の個数: 96

約数和(自身を含む): 64915200

約数和(自身を除く): 44127420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 29, 30, 39, 52, 58, 60, 65, 78, 87, 116, 130, 145, 156, 174, 195, 260, 290, 348, 377, 390, 435, 580, 754, 780, 870, 919, 1131, 1508, 1740, 1838, 1885, 2262, 2757, 3676, 3770, 4524, 4595, 5514, 5655, 7540, 9190, 11028, 11310, 11947, 13785, 18380, 22620, 23894, 26651, 27570, 35841, 47788, 53302, 55140, 59735, 71682, 79953, 106604, 119470, 133255, 143364, 159906, 179205, 238940, 266510, 319812, 346463, 358410, 399765, 533020, 692926, 716820, 799530, 1039389, 1385852, 1599060, 1732315, 2078778, 3464630, 4157556, 5196945, 6929260, 10393890, 20787780]

約数ペア:

[(1, 20787780), (2, 10393890), (3, 6929260), (4, 5196945), (5, 4157556), (6, 3464630), (10, 2078778), (12, 1732315), (13, 1599060), (15, 1385852), (20, 1039389), (26, 799530), (29, 716820), (30, 692926), (39, 533020), (52, 399765), (58, 358410), (60, 346463), (65, 319812), (78, 266510), (87, 238940), (116, 179205), (130, 159906), (145, 143364), (156, 133255), (174, 119470), (195, 106604), (260, 79953), (290, 71682), (348, 59735), (377, 55140), (390, 53302), (435, 47788), (580, 35841), (754, 27570), (780, 26651), (870, 23894), (919, 22620), (1131, 18380), (1508, 13785), (1740, 11947), (1838, 11310), (1885, 11028), (2262, 9190), (2757, 7540), (3676, 5655), (3770, 5514), (4524, 4595)]