18990585

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:175

約数の個数: 64

約数和(自身を含む): 35804160

約数和(自身を除く): 16813575

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 47, 73, 123, 135, 141, 205, 219, 235, 365, 369, 423, 615, 657, 705, 1095, 1107, 1269, 1845, 1927, 1971, 2115, 2993, 3285, 3431, 5535, 5781, 6345, 8979, 9635, 9855, 10293, 14965, 17155, 17343, 26937, 28905, 30879, 44895, 51465, 52029, 80811, 86715, 92637, 134685, 140671, 154395, 260145, 404055, 422013, 463185, 703355, 1266039, 2110065, 3798117, 6330195, 18990585]

約数ペア:

[(1, 18990585), (3, 6330195), (5, 3798117), (9, 2110065), (15, 1266039), (27, 703355), (41, 463185), (45, 422013), (47, 404055), (73, 260145), (123, 154395), (135, 140671), (141, 134685), (205, 92637), (219, 86715), (235, 80811), (365, 52029), (369, 51465), (423, 44895), (615, 30879), (657, 28905), (705, 26937), (1095, 17343), (1107, 17155), (1269, 14965), (1845, 10293), (1927, 9855), (1971, 9635), (2115, 8979), (2993, 6345), (3285, 5781), (3431, 5535)]