19618940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^4\times {\mathrm{67}}^1$

素因数の和:120

約数の個数: 60

約数和(自身を含む): 45995880

約数和(自身を除く): 26376940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 67, 110, 121, 134, 220, 242, 268, 335, 484, 605, 670, 737, 1210, 1331, 1340, 1474, 2420, 2662, 2948, 3685, 5324, 6655, 7370, 8107, 13310, 14641, 14740, 16214, 26620, 29282, 32428, 40535, 58564, 73205, 81070, 89177, 146410, 162140, 178354, 292820, 356708, 445885, 891770, 980947, 1783540, 1961894, 3923788, 4904735, 9809470, 19618940]

約数ペア:

[(1, 19618940), (2, 9809470), (4, 4904735), (5, 3923788), (10, 1961894), (11, 1783540), (20, 980947), (22, 891770), (44, 445885), (55, 356708), (67, 292820), (110, 178354), (121, 162140), (134, 146410), (220, 89177), (242, 81070), (268, 73205), (335, 58564), (484, 40535), (605, 32428), (670, 29282), (737, 26620), (1210, 16214), (1331, 14740), (1340, 14641), (1474, 13310), (2420, 8107), (2662, 7370), (2948, 6655), (3685, 5324)]