21310605

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 39677040

約数和(自身を除く): 18366435

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 89, 153, 255, 267, 313, 445, 765, 801, 939, 1335, 1513, 1565, 2817, 4005, 4539, 4695, 5321, 7565, 13617, 14085, 15963, 22695, 26605, 27857, 47889, 68085, 79815, 83571, 139285, 239445, 250713, 417855, 473569, 1253565, 1420707, 2367845, 4262121, 7103535, 21310605]

約数ペア:

[(1, 21310605), (3, 7103535), (5, 4262121), (9, 2367845), (15, 1420707), (17, 1253565), (45, 473569), (51, 417855), (85, 250713), (89, 239445), (153, 139285), (255, 83571), (267, 79815), (313, 68085), (445, 47889), (765, 27857), (801, 26605), (939, 22695), (1335, 15963), (1513, 14085), (1565, 13617), (2817, 7565), (4005, 5321), (4539, 4695)]