21233660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{461}}^1$

素因数の和:531

約数の個数: 72

約数和(自身を含む): 53089344

約数和(自身を除く): 31855684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 49, 70, 94, 98, 140, 188, 196, 235, 245, 329, 461, 470, 490, 658, 922, 940, 980, 1316, 1645, 1844, 2303, 2305, 3227, 3290, 4606, 4610, 6454, 6580, 9212, 9220, 11515, 12908, 16135, 21667, 22589, 23030, 32270, 43334, 45178, 46060, 64540, 86668, 90356, 108335, 112945, 151669, 216670, 225890, 303338, 433340, 451780, 606676, 758345, 1061683, 1516690, 2123366, 3033380, 4246732, 5308415, 10616830, 21233660]

約数ペア:

[(1, 21233660), (2, 10616830), (4, 5308415), (5, 4246732), (7, 3033380), (10, 2123366), (14, 1516690), (20, 1061683), (28, 758345), (35, 606676), (47, 451780), (49, 433340), (70, 303338), (94, 225890), (98, 216670), (140, 151669), (188, 112945), (196, 108335), (235, 90356), (245, 86668), (329, 64540), (461, 46060), (470, 45178), (490, 43334), (658, 32270), (922, 23030), (940, 22589), (980, 21667), (1316, 16135), (1645, 12908), (1844, 11515), (2303, 9220), (2305, 9212), (3227, 6580), (3290, 6454), (4606, 4610)]