21591940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:748

約数の個数: 48

約数和(自身を含む): 48037248

約数和(自身を除く): 26445308

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 73, 92, 115, 146, 230, 292, 365, 460, 643, 730, 1286, 1460, 1679, 2572, 3215, 3358, 6430, 6716, 8395, 12860, 14789, 16790, 29578, 33580, 46939, 59156, 73945, 93878, 147890, 187756, 234695, 295780, 469390, 938780, 1079597, 2159194, 4318388, 5397985, 10795970, 21591940]

約数ペア:

[(1, 21591940), (2, 10795970), (4, 5397985), (5, 4318388), (10, 2159194), (20, 1079597), (23, 938780), (46, 469390), (73, 295780), (92, 234695), (115, 187756), (146, 147890), (230, 93878), (292, 73945), (365, 59156), (460, 46939), (643, 33580), (730, 29578), (1286, 16790), (1460, 14789), (1679, 12860), (2572, 8395), (3215, 6716), (3358, 6430)]