21155265

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 39124800

約数和(自身を除く): 17969535

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 109, 171, 227, 285, 327, 545, 681, 855, 981, 1135, 1635, 2043, 2071, 3405, 4313, 4905, 6213, 10215, 10355, 12939, 18639, 21565, 24743, 31065, 38817, 64695, 74229, 93195, 123715, 194085, 222687, 371145, 470117, 1113435, 1410351, 2350585, 4231053, 7051755, 21155265]

約数ペア:

[(1, 21155265), (3, 7051755), (5, 4231053), (9, 2350585), (15, 1410351), (19, 1113435), (45, 470117), (57, 371145), (95, 222687), (109, 194085), (171, 123715), (227, 93195), (285, 74229), (327, 64695), (545, 38817), (681, 31065), (855, 24743), (981, 21565), (1135, 18639), (1635, 12939), (2043, 10355), (2071, 10215), (3405, 6213), (4313, 4905)]