20555325

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:475

約数の個数: 72

約数和(自身を含む): 43536896

約数和(自身を除く): 22981571

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 31, 35, 45, 63, 75, 93, 105, 155, 175, 217, 225, 279, 315, 421, 465, 525, 651, 775, 1085, 1263, 1395, 1575, 1953, 2105, 2325, 2947, 3255, 3789, 5425, 6315, 6975, 8841, 9765, 10525, 13051, 14735, 16275, 18945, 26523, 31575, 39153, 44205, 48825, 65255, 73675, 91357, 94725, 117459, 132615, 195765, 221025, 274071, 326275, 456785, 587295, 663075, 822213, 978825, 1370355, 2283925, 2936475, 4111065, 6851775, 20555325]

約数ペア:

[(1, 20555325), (3, 6851775), (5, 4111065), (7, 2936475), (9, 2283925), (15, 1370355), (21, 978825), (25, 822213), (31, 663075), (35, 587295), (45, 456785), (63, 326275), (75, 274071), (93, 221025), (105, 195765), (155, 132615), (175, 117459), (217, 94725), (225, 91357), (279, 73675), (315, 65255), (421, 48825), (465, 44205), (525, 39153), (651, 31575), (775, 26523), (1085, 18945), (1263, 16275), (1395, 14735), (1575, 13051), (1953, 10525), (2105, 9765), (2325, 8841), (2947, 6975), (3255, 6315), (3789, 5425)]