19848140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{787}}^1$

素因数の和:906

約数の個数: 48

約数和(自身を含む): 45407712

約数和(自身を除く): 25559572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 787, 970, 1261, 1574, 1940, 2522, 3148, 3935, 5044, 6305, 7870, 10231, 12610, 15740, 20462, 25220, 40924, 51155, 76339, 102310, 152678, 204620, 305356, 381695, 763390, 992407, 1526780, 1984814, 3969628, 4962035, 9924070, 19848140]

約数ペア:

[(1, 19848140), (2, 9924070), (4, 4962035), (5, 3969628), (10, 1984814), (13, 1526780), (20, 992407), (26, 763390), (52, 381695), (65, 305356), (97, 204620), (130, 152678), (194, 102310), (260, 76339), (388, 51155), (485, 40924), (787, 25220), (970, 20462), (1261, 15740), (1574, 12610), (1940, 10231), (2522, 7870), (3148, 6305), (3935, 5044)]