21555920

素因数分解:

$2^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1187}}^1$

素因数の和:1427

約数の個数: 40

約数和(自身を含む): 50380704

約数和(自身を除く): 28824784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 227, 454, 908, 1135, 1187, 1816, 2270, 2374, 3632, 4540, 4748, 5935, 9080, 9496, 11870, 18160, 18992, 23740, 47480, 94960, 269449, 538898, 1077796, 1347245, 2155592, 2694490, 4311184, 5388980, 10777960, 21555920]

約数ペア:

[(1, 21555920), (2, 10777960), (4, 5388980), (5, 4311184), (8, 2694490), (10, 2155592), (16, 1347245), (20, 1077796), (40, 538898), (80, 269449), (227, 94960), (454, 47480), (908, 23740), (1135, 18992), (1187, 18160), (1816, 11870), (2270, 9496), (2374, 9080), (3632, 5935), (4540, 4748)]