28724409

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^2\times {\mathrm{421}}^1$

素因数の和:475

約数の個数: 48

約数和(自身を含む): 51450240

約数和(自身を除く): 22725831

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 361, 399, 421, 513, 1083, 1197, 1263, 2527, 2947, 3249, 3591, 3789, 7581, 7999, 8841, 9747, 11367, 22743, 23997, 26523, 55993, 68229, 71991, 79569, 151981, 167979, 215973, 455943, 503937, 1063867, 1367829, 1511811, 3191601, 4103487, 9574803, 28724409]

約数ペア:

[(1, 28724409), (3, 9574803), (7, 4103487), (9, 3191601), (19, 1511811), (21, 1367829), (27, 1063867), (57, 503937), (63, 455943), (133, 215973), (171, 167979), (189, 151981), (361, 79569), (399, 71991), (421, 68229), (513, 55993), (1083, 26523), (1197, 23997), (1263, 22743), (2527, 11367), (2947, 9747), (3249, 8841), (3591, 7999), (3789, 7581)]