21404691

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{461}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 39207168

約数和(自身を除く): 17802477

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 67, 77, 99, 201, 231, 461, 469, 603, 693, 737, 1383, 1407, 2211, 3227, 4149, 4221, 5071, 5159, 6633, 9681, 15213, 15477, 29043, 30887, 35497, 45639, 46431, 92661, 106491, 216209, 277983, 319473, 339757, 648627, 1019271, 1945881, 2378299, 3057813, 7134897, 21404691]

約数ペア:

[(1, 21404691), (3, 7134897), (7, 3057813), (9, 2378299), (11, 1945881), (21, 1019271), (33, 648627), (63, 339757), (67, 319473), (77, 277983), (99, 216209), (201, 106491), (231, 92661), (461, 46431), (469, 45639), (603, 35497), (693, 30887), (737, 29043), (1383, 15477), (1407, 15213), (2211, 9681), (3227, 6633), (4149, 5159), (4221, 5071)]