21011690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{313}}^1$

素因数の和:471

約数の個数: 48

約数和(自身を含む): 44458632

約数和(自身を除く): 23446942

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 137, 245, 274, 313, 490, 626, 685, 959, 1370, 1565, 1918, 2191, 3130, 4382, 4795, 6713, 9590, 10955, 13426, 15337, 21910, 30674, 33565, 42881, 67130, 76685, 85762, 153370, 214405, 300167, 428810, 600334, 1500835, 2101169, 3001670, 4202338, 10505845, 21011690]

約数ペア:

[(1, 21011690), (2, 10505845), (5, 4202338), (7, 3001670), (10, 2101169), (14, 1500835), (35, 600334), (49, 428810), (70, 300167), (98, 214405), (137, 153370), (245, 85762), (274, 76685), (313, 67130), (490, 42881), (626, 33565), (685, 30674), (959, 21910), (1370, 15337), (1565, 13426), (1918, 10955), (2191, 9590), (3130, 6713), (4382, 4795)]