20177240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{191}}^1$

素因数の和:360

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 28206760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 139, 152, 190, 191, 278, 380, 382, 556, 695, 760, 764, 955, 1112, 1390, 1528, 1910, 2641, 2780, 3629, 3820, 5282, 5560, 7258, 7640, 10564, 13205, 14516, 18145, 21128, 26410, 26549, 29032, 36290, 52820, 53098, 72580, 105640, 106196, 132745, 145160, 212392, 265490, 504431, 530980, 1008862, 1061960, 2017724, 2522155, 4035448, 5044310, 10088620, 20177240]

約数ペア:

[(1, 20177240), (2, 10088620), (4, 5044310), (5, 4035448), (8, 2522155), (10, 2017724), (19, 1061960), (20, 1008862), (38, 530980), (40, 504431), (76, 265490), (95, 212392), (139, 145160), (152, 132745), (190, 106196), (191, 105640), (278, 72580), (380, 53098), (382, 52820), (556, 36290), (695, 29032), (760, 26549), (764, 26410), (955, 21128), (1112, 18145), (1390, 14516), (1528, 13205), (1910, 10564), (2641, 7640), (2780, 7258), (3629, 5560), (3820, 5282)]