19942840

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:496

約数の個数: 64

約数和(自身を含む): 47822400

約数和(自身を除く): 27879560

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 53, 92, 106, 115, 184, 212, 230, 265, 409, 424, 460, 530, 818, 920, 1060, 1219, 1636, 2045, 2120, 2438, 3272, 4090, 4876, 6095, 8180, 9407, 9752, 12190, 16360, 18814, 21677, 24380, 37628, 43354, 47035, 48760, 75256, 86708, 94070, 108385, 173416, 188140, 216770, 376280, 433540, 498571, 867080, 997142, 1994284, 2492855, 3988568, 4985710, 9971420, 19942840]

約数ペア:

[(1, 19942840), (2, 9971420), (4, 4985710), (5, 3988568), (8, 2492855), (10, 1994284), (20, 997142), (23, 867080), (40, 498571), (46, 433540), (53, 376280), (92, 216770), (106, 188140), (115, 173416), (184, 108385), (212, 94070), (230, 86708), (265, 75256), (409, 48760), (424, 47035), (460, 43354), (530, 37628), (818, 24380), (920, 21677), (1060, 18814), (1219, 16360), (1636, 12190), (2045, 9752), (2120, 9407), (2438, 8180), (3272, 6095), (4090, 4876)]