19794775

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1$

素因数の和:161

約数の個数: 72

約数和(自身を含む): 33841584

約数和(自身を除く): 14046809

約数列:

[1, 5, 7, 11, 13, 25, 35, 49, 55, 65, 77, 91, 113, 143, 175, 245, 275, 325, 385, 455, 539, 565, 637, 715, 791, 1001, 1225, 1243, 1469, 1925, 2275, 2695, 2825, 3185, 3575, 3955, 5005, 5537, 6215, 7007, 7345, 8701, 10283, 13475, 15925, 16159, 19775, 25025, 27685, 31075, 35035, 36725, 43505, 51415, 60907, 71981, 80795, 113113, 138425, 175175, 217525, 257075, 304535, 359905, 403975, 565565, 791791, 1522675, 1799525, 2827825, 3958955, 19794775]

約数ペア:

[(1, 19794775), (5, 3958955), (7, 2827825), (11, 1799525), (13, 1522675), (25, 791791), (35, 565565), (49, 403975), (55, 359905), (65, 304535), (77, 257075), (91, 217525), (113, 175175), (143, 138425), (175, 113113), (245, 80795), (275, 71981), (325, 60907), (385, 51415), (455, 43505), (539, 36725), (565, 35035), (637, 31075), (715, 27685), (791, 25025), (1001, 19775), (1225, 16159), (1243, 15925), (1469, 13475), (1925, 10283), (2275, 8701), (2695, 7345), (2825, 7007), (3185, 6215), (3575, 5537), (3955, 5005)]