21512565

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{461}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 40216176

約数和(自身を除く): 18703611

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 61, 85, 153, 183, 255, 305, 461, 549, 765, 915, 1037, 1383, 2305, 2745, 3111, 4149, 5185, 6915, 7837, 9333, 15555, 20745, 23511, 28121, 39185, 46665, 70533, 84363, 117555, 140605, 253089, 352665, 421815, 478057, 1265445, 1434171, 2390285, 4302513, 7170855, 21512565]

約数ペア:

[(1, 21512565), (3, 7170855), (5, 4302513), (9, 2390285), (15, 1434171), (17, 1265445), (45, 478057), (51, 421815), (61, 352665), (85, 253089), (153, 140605), (183, 117555), (255, 84363), (305, 70533), (461, 46665), (549, 39185), (765, 28121), (915, 23511), (1037, 20745), (1383, 15555), (2305, 9333), (2745, 7837), (3111, 6915), (4149, 5185)]