20619220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16901}}^1$

素因数の和:16971

約数の個数: 24

約数和(自身を含む): 44012808

約数和(自身を除く): 23393588

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16901, 33802, 67604, 84505, 169010, 338020, 1030961, 2061922, 4123844, 5154805, 10309610, 20619220]

約数ペア:

[(1, 20619220), (2, 10309610), (4, 5154805), (5, 4123844), (10, 2061922), (20, 1030961), (61, 338020), (122, 169010), (244, 84505), (305, 67604), (610, 33802), (1220, 16901)]