20161811540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{233}}^1\times {\mathrm{25601}}^1$

素因数の和:25869

約数の個数: 72

約数和(自身を含む): 46045811448

約数和(自身を除く): 25883999908

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 233, 260, 338, 466, 676, 845, 932, 1165, 1690, 2330, 3029, 3380, 4660, 6058, 12116, 15145, 25601, 30290, 39377, 51202, 60580, 78754, 102404, 128005, 157508, 196885, 256010, 332813, 393770, 512020, 665626, 787540, 1331252, 1664065, 3328130, 4326569, 5965033, 6656260, 8653138, 11930066, 17306276, 21632845, 23860132, 29825165, 43265690, 59650330, 77545429, 86531380, 119300660, 155090858, 310181716, 387727145, 775454290, 1008090577, 1550908580, 2016181154, 4032362308, 5040452885, 10080905770, 20161811540]

約数ペア:

[(1, 20161811540), (2, 10080905770), (4, 5040452885), (5, 4032362308), (10, 2016181154), (13, 1550908580), (20, 1008090577), (26, 775454290), (52, 387727145), (65, 310181716), (130, 155090858), (169, 119300660), (233, 86531380), (260, 77545429), (338, 59650330), (466, 43265690), (676, 29825165), (845, 23860132), (932, 21632845), (1165, 17306276), (1690, 11930066), (2330, 8653138), (3029, 6656260), (3380, 5965033), (4660, 4326569), (6058, 3328130), (12116, 1664065), (15145, 1331252), (25601, 787540), (30290, 665626), (39377, 512020), (51202, 393770), (60580, 332813), (78754, 256010), (102404, 196885), (128005, 157508)]