21893823

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 15845697

約数列:

[1, 3, 7, 9, 21, 53, 63, 79, 83, 159, 237, 249, 371, 477, 553, 581, 711, 747, 1113, 1659, 1743, 3339, 4187, 4399, 4977, 5229, 6557, 12561, 13197, 19671, 29309, 30793, 37683, 39591, 45899, 59013, 87927, 92379, 137697, 263781, 277137, 347521, 413091, 1042563, 2432647, 3127689, 7297941, 21893823]

約数ペア:

[(1, 21893823), (3, 7297941), (7, 3127689), (9, 2432647), (21, 1042563), (53, 413091), (63, 347521), (79, 277137), (83, 263781), (159, 137697), (237, 92379), (249, 87927), (371, 59013), (477, 45899), (553, 39591), (581, 37683), (711, 30793), (747, 29309), (1113, 19671), (1659, 13197), (1743, 12561), (3339, 6557), (4187, 5229), (4399, 4977)]