21231904

素因数分解:

$2^5\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 43356600

約数和(自身を除く): 22124696

約数列:

[1, 2, 4, 8, 16, 32, 61, 73, 122, 146, 149, 244, 292, 298, 488, 584, 596, 976, 1168, 1192, 1952, 2336, 2384, 4453, 4768, 8906, 9089, 10877, 17812, 18178, 21754, 35624, 36356, 43508, 71248, 72712, 87016, 142496, 145424, 174032, 290848, 348064, 663497, 1326994, 2653988, 5307976, 10615952, 21231904]

約数ペア:

[(1, 21231904), (2, 10615952), (4, 5307976), (8, 2653988), (16, 1326994), (32, 663497), (61, 348064), (73, 290848), (122, 174032), (146, 145424), (149, 142496), (244, 87016), (292, 72712), (298, 71248), (488, 43508), (584, 36356), (596, 35624), (976, 21754), (1168, 18178), (1192, 17812), (1952, 10877), (2336, 9089), (2384, 8906), (4453, 4768)]