21829580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 47851776

約数和(自身を除く): 26022196

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 137, 155, 257, 274, 310, 514, 548, 620, 685, 1028, 1285, 1370, 2570, 2740, 4247, 5140, 7967, 8494, 15934, 16988, 21235, 31868, 35209, 39835, 42470, 70418, 79670, 84940, 140836, 159340, 176045, 352090, 704180, 1091479, 2182958, 4365916, 5457395, 10914790, 21829580]

約数ペア:

[(1, 21829580), (2, 10914790), (4, 5457395), (5, 4365916), (10, 2182958), (20, 1091479), (31, 704180), (62, 352090), (124, 176045), (137, 159340), (155, 140836), (257, 84940), (274, 79670), (310, 70418), (514, 42470), (548, 39835), (620, 35209), (685, 31868), (1028, 21235), (1285, 16988), (1370, 15934), (2570, 8494), (2740, 7967), (4247, 5140)]