128889140

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{653}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 276877440

約数和(自身を除く): 147988300

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 355, 556, 653, 695, 710, 1306, 1390, 1420, 2612, 2780, 3265, 6530, 9869, 13060, 19738, 39476, 46363, 49345, 90767, 92726, 98690, 181534, 185452, 197380, 231815, 363068, 453835, 463630, 907670, 927260, 1815340, 6444457, 12888914, 25777828, 32222285, 64444570, 128889140]

約数ペア:

[(1, 128889140), (2, 64444570), (4, 32222285), (5, 25777828), (10, 12888914), (20, 6444457), (71, 1815340), (139, 927260), (142, 907670), (278, 463630), (284, 453835), (355, 363068), (556, 231815), (653, 197380), (695, 185452), (710, 181534), (1306, 98690), (1390, 92726), (1420, 90767), (2612, 49345), (2780, 46363), (3265, 39476), (6530, 19738), (9869, 13060)]