21970340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1129}}^1$

素因数の和:1284

約数の個数: 48

約数和(自身を含む): 53155200

約数和(自身を除く): 31184860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1129, 1390, 1946, 2258, 2780, 3892, 4516, 4865, 5645, 7903, 9730, 11290, 15806, 19460, 22580, 31612, 39515, 79030, 156931, 158060, 313862, 627724, 784655, 1098517, 1569310, 2197034, 3138620, 4394068, 5492585, 10985170, 21970340]

約数ペア:

[(1, 21970340), (2, 10985170), (4, 5492585), (5, 4394068), (7, 3138620), (10, 2197034), (14, 1569310), (20, 1098517), (28, 784655), (35, 627724), (70, 313862), (139, 158060), (140, 156931), (278, 79030), (556, 39515), (695, 31612), (973, 22580), (1129, 19460), (1390, 15806), (1946, 11290), (2258, 9730), (2780, 7903), (3892, 5645), (4516, 4865)]