21030625

素因数分解:

$5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:80

約数の個数: 80

約数和(自身を含む): 35988480

約数和(自身を除く): 14957855

約数列:

[1, 5, 7, 11, 19, 23, 25, 35, 55, 77, 95, 115, 125, 133, 161, 175, 209, 253, 275, 385, 437, 475, 575, 625, 665, 805, 875, 1045, 1265, 1375, 1463, 1771, 1925, 2185, 2375, 2875, 3059, 3325, 4025, 4375, 4807, 5225, 6325, 6875, 7315, 8855, 9625, 10925, 11875, 14375, 15295, 16625, 20125, 24035, 26125, 31625, 33649, 36575, 44275, 48125, 54625, 76475, 83125, 100625, 120175, 130625, 158125, 168245, 182875, 221375, 273125, 382375, 600875, 841225, 914375, 1106875, 1911875, 3004375, 4206125, 21030625]

約数ペア:

[(1, 21030625), (5, 4206125), (7, 3004375), (11, 1911875), (19, 1106875), (23, 914375), (25, 841225), (35, 600875), (55, 382375), (77, 273125), (95, 221375), (115, 182875), (125, 168245), (133, 158125), (161, 130625), (175, 120175), (209, 100625), (253, 83125), (275, 76475), (385, 54625), (437, 48125), (475, 44275), (575, 36575), (625, 33649), (665, 31625), (805, 26125), (875, 24035), (1045, 20125), (1265, 16625), (1375, 15295), (1463, 14375), (1771, 11875), (1925, 10925), (2185, 9625), (2375, 8855), (2875, 7315), (3059, 6875), (3325, 6325), (4025, 5225), (4375, 4807)]