19825988

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 25219516

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 31, 49, 52, 62, 91, 98, 124, 182, 196, 217, 251, 364, 403, 434, 502, 637, 806, 868, 1004, 1274, 1519, 1612, 1757, 2548, 2821, 3038, 3263, 3514, 5642, 6076, 6526, 7028, 7781, 11284, 12299, 13052, 15562, 19747, 22841, 24598, 31124, 39494, 45682, 49196, 54467, 78988, 91364, 101153, 108934, 159887, 202306, 217868, 319774, 381269, 404612, 639548, 708071, 762538, 1416142, 1525076, 2832284, 4956497, 9912994, 19825988]

約数ペア:

[(1, 19825988), (2, 9912994), (4, 4956497), (7, 2832284), (13, 1525076), (14, 1416142), (26, 762538), (28, 708071), (31, 639548), (49, 404612), (52, 381269), (62, 319774), (91, 217868), (98, 202306), (124, 159887), (182, 108934), (196, 101153), (217, 91364), (251, 78988), (364, 54467), (403, 49196), (434, 45682), (502, 39494), (637, 31124), (806, 24598), (868, 22841), (1004, 19747), (1274, 15562), (1519, 13052), (1612, 12299), (1757, 11284), (2548, 7781), (2821, 7028), (3038, 6526), (3263, 6076), (3514, 5642)]