20829675

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^2\times {\mathrm{31}}^2$

素因数の和:109

約数の個数: 54

約数和(自身を含む): 37801524

約数和(自身を除く): 16971849

約数列:

[1, 3, 5, 15, 17, 25, 31, 51, 75, 85, 93, 155, 255, 289, 425, 465, 527, 775, 867, 961, 1275, 1445, 1581, 2325, 2635, 2883, 4335, 4805, 7225, 7905, 8959, 13175, 14415, 16337, 21675, 24025, 26877, 39525, 44795, 49011, 72075, 81685, 134385, 223975, 245055, 277729, 408425, 671925, 833187, 1225275, 1388645, 4165935, 6943225, 20829675]

約数ペア:

[(1, 20829675), (3, 6943225), (5, 4165935), (15, 1388645), (17, 1225275), (25, 833187), (31, 671925), (51, 408425), (75, 277729), (85, 245055), (93, 223975), (155, 134385), (255, 81685), (289, 72075), (425, 49011), (465, 44795), (527, 39525), (775, 26877), (867, 24025), (961, 21675), (1275, 16337), (1445, 14415), (1581, 13175), (2325, 8959), (2635, 7905), (2883, 7225), (4335, 4805)]