21193515

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{547}}^1$

素因数の和:609

約数の個数: 64

約数和(自身を含む): 44190720

約数和(自身を除く): 22997205

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 41, 45, 63, 105, 123, 135, 189, 205, 287, 315, 369, 547, 615, 861, 945, 1107, 1435, 1641, 1845, 2583, 2735, 3829, 4305, 4923, 5535, 7749, 8205, 11487, 12915, 14769, 19145, 22427, 24615, 34461, 38745, 57435, 67281, 73845, 103383, 112135, 156989, 172305, 201843, 336405, 470967, 516915, 605529, 784945, 1009215, 1412901, 2354835, 3027645, 4238703, 7064505, 21193515]

約数ペア:

[(1, 21193515), (3, 7064505), (5, 4238703), (7, 3027645), (9, 2354835), (15, 1412901), (21, 1009215), (27, 784945), (35, 605529), (41, 516915), (45, 470967), (63, 336405), (105, 201843), (123, 172305), (135, 156989), (189, 112135), (205, 103383), (287, 73845), (315, 67281), (369, 57435), (547, 38745), (615, 34461), (861, 24615), (945, 22427), (1107, 19145), (1435, 14769), (1641, 12915), (1845, 11487), (2583, 8205), (2735, 7749), (3829, 5535), (4305, 4923)]