20997735

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{503}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 38610432

約数和(自身を除く): 17612697

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 121, 165, 253, 345, 363, 503, 605, 759, 1265, 1509, 1815, 2515, 2783, 3795, 5533, 7545, 8349, 11569, 13915, 16599, 27665, 34707, 41745, 57845, 60863, 82995, 127259, 173535, 182589, 304315, 381777, 636295, 912945, 1399849, 1908885, 4199547, 6999245, 20997735]

約数ペア:

[(1, 20997735), (3, 6999245), (5, 4199547), (11, 1908885), (15, 1399849), (23, 912945), (33, 636295), (55, 381777), (69, 304315), (115, 182589), (121, 173535), (165, 127259), (253, 82995), (345, 60863), (363, 57845), (503, 41745), (605, 34707), (759, 27665), (1265, 16599), (1509, 13915), (1815, 11569), (2515, 8349), (2783, 7545), (3795, 5533)]