19685180

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 42641760

約数和(自身を除く): 22956580

約数列:

[1, 2, 4, 5, 10, 20, 73, 97, 139, 146, 194, 278, 292, 365, 388, 485, 556, 695, 730, 970, 1390, 1460, 1940, 2780, 7081, 10147, 13483, 14162, 20294, 26966, 28324, 35405, 40588, 50735, 53932, 67415, 70810, 101470, 134830, 141620, 202940, 269660, 984259, 1968518, 3937036, 4921295, 9842590, 19685180]

約数ペア:

[(1, 19685180), (2, 9842590), (4, 4921295), (5, 3937036), (10, 1968518), (20, 984259), (73, 269660), (97, 202940), (139, 141620), (146, 134830), (194, 101470), (278, 70810), (292, 67415), (365, 53932), (388, 50735), (485, 40588), (556, 35405), (695, 28324), (730, 26966), (970, 20294), (1390, 14162), (1460, 13483), (1940, 10147), (2780, 7081)]