20672940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^2$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 60434640

約数和(自身を除く): 39761700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 29, 30, 58, 60, 87, 109, 116, 145, 174, 218, 290, 327, 348, 435, 436, 545, 580, 654, 870, 1090, 1308, 1635, 1740, 2180, 3161, 3270, 6322, 6540, 9483, 11881, 12644, 15805, 18966, 23762, 31610, 35643, 37932, 47415, 47524, 59405, 63220, 71286, 94830, 118810, 142572, 178215, 189660, 237620, 344549, 356430, 689098, 712860, 1033647, 1378196, 1722745, 2067294, 3445490, 4134588, 5168235, 6890980, 10336470, 20672940]

約数ペア:

[(1, 20672940), (2, 10336470), (3, 6890980), (4, 5168235), (5, 4134588), (6, 3445490), (10, 2067294), (12, 1722745), (15, 1378196), (20, 1033647), (29, 712860), (30, 689098), (58, 356430), (60, 344549), (87, 237620), (109, 189660), (116, 178215), (145, 142572), (174, 118810), (218, 94830), (290, 71286), (327, 63220), (348, 59405), (435, 47524), (436, 47415), (545, 37932), (580, 35643), (654, 31610), (870, 23762), (1090, 18966), (1308, 15805), (1635, 12644), (1740, 11881), (2180, 9483), (3161, 6540), (3270, 6322)]