20571579

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 35515584

約数和(自身を除く): 14944005

約数列:

[1, 3, 7, 9, 21, 53, 61, 63, 101, 159, 183, 303, 371, 427, 477, 549, 707, 909, 1113, 1281, 2121, 3233, 3339, 3843, 5353, 6161, 6363, 9699, 16059, 18483, 22631, 29097, 37471, 43127, 48177, 55449, 67893, 112413, 129381, 203679, 326533, 337239, 388143, 979599, 2285731, 2938797, 6857193, 20571579]

約数ペア:

[(1, 20571579), (3, 6857193), (7, 2938797), (9, 2285731), (21, 979599), (53, 388143), (61, 337239), (63, 326533), (101, 203679), (159, 129381), (183, 112413), (303, 67893), (371, 55449), (427, 48177), (477, 43127), (549, 37471), (707, 29097), (909, 22631), (1113, 18483), (1281, 16059), (2121, 9699), (3233, 6363), (3339, 6161), (3843, 5353)]