21780050

素因数分解:

$2^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{193}}^1$

素因数の和:303

約数の個数: 48

約数和(自身を含む): 42506952

約数和(自身を除く): 20726902

約数列:

[1, 2, 5, 10, 25, 37, 50, 61, 74, 122, 185, 193, 305, 370, 386, 610, 925, 965, 1525, 1850, 1930, 2257, 3050, 4514, 4825, 7141, 9650, 11285, 11773, 14282, 22570, 23546, 35705, 56425, 58865, 71410, 112850, 117730, 178525, 294325, 357050, 435601, 588650, 871202, 2178005, 4356010, 10890025, 21780050]

約数ペア:

[(1, 21780050), (2, 10890025), (5, 4356010), (10, 2178005), (25, 871202), (37, 588650), (50, 435601), (61, 357050), (74, 294325), (122, 178525), (185, 117730), (193, 112850), (305, 71410), (370, 58865), (386, 56425), (610, 35705), (925, 23546), (965, 22570), (1525, 14282), (1850, 11773), (1930, 11285), (2257, 9650), (3050, 7141), (4514, 4825)]