21113925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{307}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 40330752

約数和(自身を除く): 19216827

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 131, 175, 307, 393, 525, 655, 917, 921, 1535, 1965, 2149, 2751, 3275, 4585, 4605, 6447, 7675, 9825, 10745, 13755, 22925, 23025, 32235, 40217, 53725, 68775, 120651, 161175, 201085, 281519, 603255, 844557, 1005425, 1407595, 3016275, 4222785, 7037975, 21113925]

約数ペア:

[(1, 21113925), (3, 7037975), (5, 4222785), (7, 3016275), (15, 1407595), (21, 1005425), (25, 844557), (35, 603255), (75, 281519), (105, 201085), (131, 161175), (175, 120651), (307, 68775), (393, 53725), (525, 40217), (655, 32235), (917, 23025), (921, 22925), (1535, 13755), (1965, 10745), (2149, 9825), (2751, 7675), (3275, 6447), (4585, 4605)]