20638940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7759}}^1$

素因数の和:7794

約数の個数: 48

約数和(自身を含む): 52147200

約数和(自身を除く): 31508260

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7759, 15518, 31036, 38795, 54313, 77590, 108626, 147421, 155180, 217252, 271565, 294842, 543130, 589684, 737105, 1031947, 1086260, 1474210, 2063894, 2948420, 4127788, 5159735, 10319470, 20638940]

約数ペア:

[(1, 20638940), (2, 10319470), (4, 5159735), (5, 4127788), (7, 2948420), (10, 2063894), (14, 1474210), (19, 1086260), (20, 1031947), (28, 737105), (35, 589684), (38, 543130), (70, 294842), (76, 271565), (95, 217252), (133, 155180), (140, 147421), (190, 108626), (266, 77590), (380, 54313), (532, 38795), (665, 31036), (1330, 15518), (2660, 7759)]