20565180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2657}}^1$

素因数の和:2715

約数の個数: 72

約数和(自身を含む): 63855792

約数和(自身を除く): 43290612

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2657, 3870, 5314, 7740, 7971, 10628, 13285, 15942, 23913, 26570, 31884, 39855, 47826, 53140, 79710, 95652, 114251, 119565, 159420, 228502, 239130, 342753, 457004, 478260, 571255, 685506, 1028259, 1142510, 1371012, 1713765, 2056518, 2285020, 3427530, 4113036, 5141295, 6855060, 10282590, 20565180]

約数ペア:

[(1, 20565180), (2, 10282590), (3, 6855060), (4, 5141295), (5, 4113036), (6, 3427530), (9, 2285020), (10, 2056518), (12, 1713765), (15, 1371012), (18, 1142510), (20, 1028259), (30, 685506), (36, 571255), (43, 478260), (45, 457004), (60, 342753), (86, 239130), (90, 228502), (129, 159420), (172, 119565), (180, 114251), (215, 95652), (258, 79710), (387, 53140), (430, 47826), (516, 39855), (645, 31884), (774, 26570), (860, 23913), (1290, 15942), (1548, 13285), (1935, 10628), (2580, 7971), (2657, 7740), (3870, 5314)]