397178840

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{60917}}^1$

素因数の和:61091

約数の個数: 32

約数和(自身を含む): 899149680

約数和(自身を除く): 501970840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 60917, 121834, 243668, 304585, 487336, 609170, 1218340, 2436680, 9929471, 19858942, 39717884, 49647355, 79435768, 99294710, 198589420, 397178840]

約数ペア:

[(1, 397178840), (2, 198589420), (4, 99294710), (5, 79435768), (8, 49647355), (10, 39717884), (20, 19858942), (40, 9929471), (163, 2436680), (326, 1218340), (652, 609170), (815, 487336), (1304, 304585), (1630, 243668), (3260, 121834), (6520, 60917)]