31402880

素因数分解:

$2^7\times 5^1\times {\mathrm{139}}^1\times {\mathrm{353}}^1$

素因数の和:511

約数の個数: 64

約数和(自身を含む): 75826800

約数和(自身を除く): 44423920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 139, 160, 278, 320, 353, 556, 640, 695, 706, 1112, 1390, 1412, 1765, 2224, 2780, 2824, 3530, 4448, 5560, 5648, 7060, 8896, 11120, 11296, 14120, 17792, 22240, 22592, 28240, 44480, 45184, 49067, 56480, 88960, 98134, 112960, 196268, 225920, 245335, 392536, 490670, 785072, 981340, 1570144, 1962680, 3140288, 3925360, 6280576, 7850720, 15701440, 31402880]

約数ペア:

[(1, 31402880), (2, 15701440), (4, 7850720), (5, 6280576), (8, 3925360), (10, 3140288), (16, 1962680), (20, 1570144), (32, 981340), (40, 785072), (64, 490670), (80, 392536), (128, 245335), (139, 225920), (160, 196268), (278, 112960), (320, 98134), (353, 88960), (556, 56480), (640, 49067), (695, 45184), (706, 44480), (1112, 28240), (1390, 22592), (1412, 22240), (1765, 17792), (2224, 14120), (2780, 11296), (2824, 11120), (3530, 8896), (4448, 7060), (5560, 5648)]