20643928

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{719}}^1$

素因数の和:859

約数の個数: 32

約数和(自身を含む): 40219200

約数和(自身を除く): 19575272

約数列:

[1, 2, 4, 8, 37, 74, 97, 148, 194, 296, 388, 719, 776, 1438, 2876, 3589, 5752, 7178, 14356, 26603, 28712, 53206, 69743, 106412, 139486, 212824, 278972, 557944, 2580491, 5160982, 10321964, 20643928]

約数ペア:

[(1, 20643928), (2, 10321964), (4, 5160982), (8, 2580491), (37, 557944), (74, 278972), (97, 212824), (148, 139486), (194, 106412), (296, 69743), (388, 53206), (719, 28712), (776, 26603), (1438, 14356), (2876, 7178), (3589, 5752)]