20899425

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 36426240

約数和(自身を除く): 15526815

約数列:

[1, 3, 5, 15, 25, 31, 75, 89, 93, 101, 155, 267, 303, 445, 465, 505, 775, 1335, 1515, 2225, 2325, 2525, 2759, 3131, 6675, 7575, 8277, 8989, 9393, 13795, 15655, 26967, 41385, 44945, 46965, 68975, 78275, 134835, 206925, 224725, 234825, 278659, 674175, 835977, 1393295, 4179885, 6966475, 20899425]

約数ペア:

[(1, 20899425), (3, 6966475), (5, 4179885), (15, 1393295), (25, 835977), (31, 674175), (75, 278659), (89, 234825), (93, 224725), (101, 206925), (155, 134835), (267, 78275), (303, 68975), (445, 46965), (465, 44945), (505, 41385), (775, 26967), (1335, 15655), (1515, 13795), (2225, 9393), (2325, 8989), (2525, 8277), (2759, 7575), (3131, 6675)]