261204915

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:420

約数の個数: 64

約数和(自身を含む): 461832192

約数和(自身を除く): 200627277

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 173, 191, 255, 465, 519, 527, 573, 865, 955, 1581, 2595, 2635, 2865, 2941, 3247, 5363, 5921, 7905, 8823, 9741, 14705, 16089, 16235, 17763, 26815, 29605, 33043, 44115, 48705, 80445, 88815, 91171, 99129, 100657, 165215, 273513, 301971, 455855, 495645, 503285, 561731, 1024333, 1367565, 1509855, 1685193, 2808655, 3072999, 5121665, 8425965, 15364995, 17413661, 52240983, 87068305, 261204915]

約数ペア:

[(1, 261204915), (3, 87068305), (5, 52240983), (15, 17413661), (17, 15364995), (31, 8425965), (51, 5121665), (85, 3072999), (93, 2808655), (155, 1685193), (173, 1509855), (191, 1367565), (255, 1024333), (465, 561731), (519, 503285), (527, 495645), (573, 455855), (865, 301971), (955, 273513), (1581, 165215), (2595, 100657), (2635, 99129), (2865, 91171), (2941, 88815), (3247, 80445), (5363, 48705), (5921, 44115), (7905, 33043), (8823, 29605), (9741, 26815), (14705, 17763), (16089, 16235)]