19978740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6529}}^1$

素因数の和:6561

約数の個数: 72

約数和(自身を含む): 64176840

約数和(自身を除く): 44198100

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6529, 13058, 19587, 26116, 32645, 39174, 58761, 65290, 78348, 97935, 110993, 117522, 130580, 195870, 221986, 235044, 293805, 332979, 391740, 443972, 554965, 587610, 665958, 998937, 1109930, 1175220, 1331916, 1664895, 1997874, 2219860, 3329790, 3995748, 4994685, 6659580, 9989370, 19978740]

約数ペア:

[(1, 19978740), (2, 9989370), (3, 6659580), (4, 4994685), (5, 3995748), (6, 3329790), (9, 2219860), (10, 1997874), (12, 1664895), (15, 1331916), (17, 1175220), (18, 1109930), (20, 998937), (30, 665958), (34, 587610), (36, 554965), (45, 443972), (51, 391740), (60, 332979), (68, 293805), (85, 235044), (90, 221986), (102, 195870), (153, 130580), (170, 117522), (180, 110993), (204, 97935), (255, 78348), (306, 65290), (340, 58761), (510, 39174), (612, 32645), (765, 26116), (1020, 19587), (1530, 13058), (3060, 6529)]