217983640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{778513}}^1$

素因数の和:778531

約数の個数: 32

約数和(自身を含む): 560530080

約数和(自身を除く): 342546440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 778513, 1557026, 3114052, 3892565, 5449591, 6228104, 7785130, 10899182, 15570260, 21798364, 27247955, 31140520, 43596728, 54495910, 108991820, 217983640]

約数ペア:

[(1, 217983640), (2, 108991820), (4, 54495910), (5, 43596728), (7, 31140520), (8, 27247955), (10, 21798364), (14, 15570260), (20, 10899182), (28, 7785130), (35, 6228104), (40, 5449591), (56, 3892565), (70, 3114052), (140, 1557026), (280, 778513)]