19943980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{433}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 29927828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 49, 70, 94, 98, 140, 188, 196, 235, 245, 329, 433, 470, 490, 658, 866, 940, 980, 1316, 1645, 1732, 2165, 2303, 3031, 3290, 4330, 4606, 6062, 6580, 8660, 9212, 11515, 12124, 15155, 20351, 21217, 23030, 30310, 40702, 42434, 46060, 60620, 81404, 84868, 101755, 106085, 142457, 203510, 212170, 284914, 407020, 424340, 569828, 712285, 997199, 1424570, 1994398, 2849140, 3988796, 4985995, 9971990, 19943980]

約数ペア:

[(1, 19943980), (2, 9971990), (4, 4985995), (5, 3988796), (7, 2849140), (10, 1994398), (14, 1424570), (20, 997199), (28, 712285), (35, 569828), (47, 424340), (49, 407020), (70, 284914), (94, 212170), (98, 203510), (140, 142457), (188, 106085), (196, 101755), (235, 84868), (245, 81404), (329, 60620), (433, 46060), (470, 42434), (490, 40702), (658, 30310), (866, 23030), (940, 21217), (980, 20351), (1316, 15155), (1645, 12124), (1732, 11515), (2165, 9212), (2303, 8660), (3031, 6580), (3290, 6062), (4330, 4606)]