21155645

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1097}}^1$

素因数の和:1157

約数の個数: 32

約数和(自身を含む): 31622400

約数和(自身を除く): 10466755

約数列:

[1, 5, 7, 19, 29, 35, 95, 133, 145, 203, 551, 665, 1015, 1097, 2755, 3857, 5485, 7679, 19285, 20843, 31813, 38395, 104215, 145901, 159065, 222691, 604447, 729505, 1113455, 3022235, 4231129, 21155645]

約数ペア:

[(1, 21155645), (5, 4231129), (7, 3022235), (19, 1113455), (29, 729505), (35, 604447), (95, 222691), (133, 159065), (145, 145901), (203, 104215), (551, 38395), (665, 31813), (1015, 20843), (1097, 19285), (2755, 7679), (3857, 5485)]