21330190

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{431}}^1$

素因数の和:553

約数の個数: 48

約数和(自身を含む): 45209664

約数和(自身を除く): 23879474

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 101, 202, 245, 431, 490, 505, 707, 862, 1010, 1414, 2155, 3017, 3535, 4310, 4949, 6034, 7070, 9898, 15085, 21119, 24745, 30170, 42238, 43531, 49490, 87062, 105595, 211190, 217655, 304717, 435310, 609434, 1523585, 2133019, 3047170, 4266038, 10665095, 21330190]

約数ペア:

[(1, 21330190), (2, 10665095), (5, 4266038), (7, 3047170), (10, 2133019), (14, 1523585), (35, 609434), (49, 435310), (70, 304717), (98, 217655), (101, 211190), (202, 105595), (245, 87062), (431, 49490), (490, 43531), (505, 42238), (707, 30170), (862, 24745), (1010, 21119), (1414, 15085), (2155, 9898), (3017, 7070), (3535, 6034), (4310, 4949)]