30991280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{20389}}^1$

素因数の和:20421

約数の個数: 40

約数和(自身を含む): 75850800

約数和(自身を除く): 44859520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 20389, 40778, 81556, 101945, 163112, 203890, 326224, 387391, 407780, 774782, 815560, 1549564, 1631120, 1936955, 3099128, 3873910, 6198256, 7747820, 15495640, 30991280]

約数ペア:

[(1, 30991280), (2, 15495640), (4, 7747820), (5, 6198256), (8, 3873910), (10, 3099128), (16, 1936955), (19, 1631120), (20, 1549564), (38, 815560), (40, 774782), (76, 407780), (80, 387391), (95, 326224), (152, 203890), (190, 163112), (304, 101945), (380, 81556), (760, 40778), (1520, 20389)]