21415625

素因数分解:

$5^5\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1$

素因数の和:132

約数の個数: 48

約数和(自身を含む): 33747840

約数和(自身を除く): 12332215

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 89, 125, 175, 275, 385, 445, 623, 625, 875, 979, 1375, 1925, 2225, 3115, 3125, 4375, 4895, 6853, 6875, 9625, 11125, 15575, 21875, 24475, 34265, 34375, 48125, 55625, 77875, 122375, 171325, 240625, 278125, 389375, 611875, 856625, 1946875, 3059375, 4283125, 21415625]

約数ペア:

[(1, 21415625), (5, 4283125), (7, 3059375), (11, 1946875), (25, 856625), (35, 611875), (55, 389375), (77, 278125), (89, 240625), (125, 171325), (175, 122375), (275, 77875), (385, 55625), (445, 48125), (623, 34375), (625, 34265), (875, 24475), (979, 21875), (1375, 15575), (1925, 11125), (2225, 9625), (3115, 6875), (3125, 6853), (4375, 4895)]