19986850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{317}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 40575528

約数和(自身を除く): 20588678

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 97, 130, 194, 317, 325, 485, 634, 650, 970, 1261, 1585, 2425, 2522, 3170, 4121, 4850, 6305, 7925, 8242, 12610, 15850, 20605, 30749, 31525, 41210, 61498, 63050, 103025, 153745, 206050, 307490, 399737, 768725, 799474, 1537450, 1998685, 3997370, 9993425, 19986850]

約数ペア:

[(1, 19986850), (2, 9993425), (5, 3997370), (10, 1998685), (13, 1537450), (25, 799474), (26, 768725), (50, 399737), (65, 307490), (97, 206050), (130, 153745), (194, 103025), (317, 63050), (325, 61498), (485, 41210), (634, 31525), (650, 30749), (970, 20605), (1261, 15850), (1585, 12610), (2425, 8242), (2522, 7925), (3170, 6305), (4121, 4850)]