21645420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21221}}^1$

素因数の和:21250

約数の個数: 48

約数和(自身を含む): 64175328

約数和(自身を除く): 42529908

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21221, 42442, 63663, 84884, 106105, 127326, 212210, 254652, 318315, 360757, 424420, 636630, 721514, 1082271, 1273260, 1443028, 1803785, 2164542, 3607570, 4329084, 5411355, 7215140, 10822710, 21645420]

約数ペア:

[(1, 21645420), (2, 10822710), (3, 7215140), (4, 5411355), (5, 4329084), (6, 3607570), (10, 2164542), (12, 1803785), (15, 1443028), (17, 1273260), (20, 1082271), (30, 721514), (34, 636630), (51, 424420), (60, 360757), (68, 318315), (85, 254652), (102, 212210), (170, 127326), (204, 106105), (255, 84884), (340, 63663), (510, 42442), (1020, 21221)]