20517435

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{421}}^1$

素因数の和:473

約数の個数: 48

約数和(自身を含む): 38587680

約数和(自身を除く): 18070245

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 361, 421, 513, 855, 1083, 1263, 1805, 2105, 2565, 3249, 3789, 5415, 6315, 7999, 9747, 11367, 16245, 18945, 23997, 39995, 48735, 56835, 71991, 119985, 151981, 215973, 359955, 455943, 759905, 1079865, 1367829, 2279715, 4103487, 6839145, 20517435]

約数ペア:

[(1, 20517435), (3, 6839145), (5, 4103487), (9, 2279715), (15, 1367829), (19, 1079865), (27, 759905), (45, 455943), (57, 359955), (95, 215973), (135, 151981), (171, 119985), (285, 71991), (361, 56835), (421, 48735), (513, 39995), (855, 23997), (1083, 18945), (1263, 16245), (1805, 11367), (2105, 9747), (2565, 7999), (3249, 6315), (3789, 5415)]