21999212

素因数分解:

$2^2\times {\mathrm{31}}^2\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:222

約数の個数: 36

約数和(自身を含む): 40871880

約数和(自身を除く): 18872668

約数列:

[1, 2, 4, 31, 59, 62, 97, 118, 124, 194, 236, 388, 961, 1829, 1922, 3007, 3658, 3844, 5723, 6014, 7316, 11446, 12028, 22892, 56699, 93217, 113398, 177413, 186434, 226796, 354826, 372868, 709652, 5499803, 10999606, 21999212]

約数ペア:

[(1, 21999212), (2, 10999606), (4, 5499803), (31, 709652), (59, 372868), (62, 354826), (97, 226796), (118, 186434), (124, 177413), (194, 113398), (236, 93217), (388, 56699), (961, 22892), (1829, 12028), (1922, 11446), (3007, 7316), (3658, 6014), (3844, 5723)]