21471065

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 33882624

約数和(自身を除く): 12411559

約数列:

[1, 5, 7, 11, 31, 35, 49, 55, 77, 155, 217, 245, 257, 341, 385, 539, 1085, 1285, 1519, 1705, 1799, 2387, 2695, 2827, 7595, 7967, 8995, 11935, 12593, 14135, 16709, 19789, 39835, 55769, 62965, 83545, 87637, 98945, 138523, 278845, 390383, 438185, 613459, 692615, 1951915, 3067295, 4294213, 21471065]

約数ペア:

[(1, 21471065), (5, 4294213), (7, 3067295), (11, 1951915), (31, 692615), (35, 613459), (49, 438185), (55, 390383), (77, 278845), (155, 138523), (217, 98945), (245, 87637), (257, 83545), (341, 62965), (385, 55769), (539, 39835), (1085, 19789), (1285, 16709), (1519, 14135), (1705, 12593), (1799, 11935), (2387, 8995), (2695, 7967), (2827, 7595)]