21790398

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{541}}^1$

素因数の和:697

約数の個数: 48

約数和(自身を含む): 51160464

約数和(自身を除く): 29370066

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 137, 147, 274, 294, 411, 541, 822, 959, 1082, 1623, 1918, 2877, 3246, 3787, 5754, 6713, 7574, 11361, 13426, 20139, 22722, 26509, 40278, 53018, 74117, 79527, 148234, 159054, 222351, 444702, 518819, 1037638, 1556457, 3112914, 3631733, 7263466, 10895199, 21790398]

約数ペア:

[(1, 21790398), (2, 10895199), (3, 7263466), (6, 3631733), (7, 3112914), (14, 1556457), (21, 1037638), (42, 518819), (49, 444702), (98, 222351), (137, 159054), (147, 148234), (274, 79527), (294, 74117), (411, 53018), (541, 40278), (822, 26509), (959, 22722), (1082, 20139), (1623, 13426), (1918, 11361), (2877, 7574), (3246, 6713), (3787, 5754)]