21979375

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:193

約数の個数: 40

約数和(自身を含む): 31489920

約数和(自身を除く): 9510545

約数列:

[1, 5, 11, 23, 25, 55, 115, 125, 139, 253, 275, 575, 625, 695, 1265, 1375, 1529, 2875, 3197, 3475, 6325, 6875, 7645, 14375, 15985, 17375, 31625, 35167, 38225, 79925, 86875, 158125, 175835, 191125, 399625, 879175, 955625, 1998125, 4395875, 21979375]

約数ペア:

[(1, 21979375), (5, 4395875), (11, 1998125), (23, 955625), (25, 879175), (55, 399625), (115, 191125), (125, 175835), (139, 158125), (253, 86875), (275, 79925), (575, 38225), (625, 35167), (695, 31625), (1265, 17375), (1375, 15985), (1529, 14375), (2875, 7645), (3197, 6875), (3475, 6325)]