21972825

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1993}}^1$

素因数の和:2023

約数の個数: 54

約数和(自身を含む): 45804174

約数和(自身を除く): 23831349

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 1993, 2205, 3675, 5979, 9965, 11025, 13951, 17937, 29895, 41853, 49825, 69755, 89685, 97657, 125559, 149475, 209265, 292971, 348775, 448425, 488285, 627795, 878913, 1046325, 1464855, 2441425, 3138975, 4394565, 7324275, 21972825]

約数ペア:

[(1, 21972825), (3, 7324275), (5, 4394565), (7, 3138975), (9, 2441425), (15, 1464855), (21, 1046325), (25, 878913), (35, 627795), (45, 488285), (49, 448425), (63, 348775), (75, 292971), (105, 209265), (147, 149475), (175, 125559), (225, 97657), (245, 89685), (315, 69755), (441, 49825), (525, 41853), (735, 29895), (1225, 17937), (1575, 13951), (1993, 11025), (2205, 9965), (3675, 5979)]