20402505

素因数分解:

$3^2\times 5^1\times {\mathrm{67}}^2\times {\mathrm{101}}^1$

素因数の和:246

約数の個数: 36

約数和(自身を含む): 36255492

約数和(自身を除く): 15852987

約数列:

[1, 3, 5, 9, 15, 45, 67, 101, 201, 303, 335, 505, 603, 909, 1005, 1515, 3015, 4489, 4545, 6767, 13467, 20301, 22445, 33835, 40401, 60903, 67335, 101505, 202005, 304515, 453389, 1360167, 2266945, 4080501, 6800835, 20402505]

約数ペア:

[(1, 20402505), (3, 6800835), (5, 4080501), (9, 2266945), (15, 1360167), (45, 453389), (67, 304515), (101, 202005), (201, 101505), (303, 67335), (335, 60903), (505, 40401), (603, 33835), (909, 22445), (1005, 20301), (1515, 13467), (3015, 6767), (4489, 4545)]