20880990

素因数分解:

$2^1\times 3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:696

約数の個数: 96

約数和(自身を含む): 60723936

約数和(自身を除く): 39842946

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 27, 30, 39, 45, 54, 65, 78, 81, 90, 117, 130, 135, 162, 195, 234, 243, 270, 351, 390, 405, 486, 585, 661, 702, 810, 1053, 1170, 1215, 1322, 1755, 1983, 2106, 2430, 3159, 3305, 3510, 3966, 5265, 5949, 6318, 6610, 8593, 9915, 10530, 11898, 15795, 17186, 17847, 19830, 25779, 29745, 31590, 35694, 42965, 51558, 53541, 59490, 77337, 85930, 89235, 107082, 128895, 154674, 160623, 178470, 232011, 257790, 267705, 321246, 386685, 464022, 535410, 696033, 773370, 803115, 1160055, 1392066, 1606230, 2088099, 2320110, 3480165, 4176198, 6960330, 10440495, 20880990]

約数ペア:

[(1, 20880990), (2, 10440495), (3, 6960330), (5, 4176198), (6, 3480165), (9, 2320110), (10, 2088099), (13, 1606230), (15, 1392066), (18, 1160055), (26, 803115), (27, 773370), (30, 696033), (39, 535410), (45, 464022), (54, 386685), (65, 321246), (78, 267705), (81, 257790), (90, 232011), (117, 178470), (130, 160623), (135, 154674), (162, 128895), (195, 107082), (234, 89235), (243, 85930), (270, 77337), (351, 59490), (390, 53541), (405, 51558), (486, 42965), (585, 35694), (661, 31590), (702, 29745), (810, 25779), (1053, 19830), (1170, 17847), (1215, 17186), (1322, 15795), (1755, 11898), (1983, 10530), (2106, 9915), (2430, 8593), (3159, 6610), (3305, 6318), (3510, 5949), (3966, 5265)]