21502775

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 33331200

約数和(自身を除く): 11828425

約数列:

[1, 5, 7, 19, 25, 29, 35, 95, 133, 145, 175, 203, 223, 475, 551, 665, 725, 1015, 1115, 1561, 2755, 3325, 3857, 4237, 5075, 5575, 6467, 7805, 13775, 19285, 21185, 29659, 32335, 39025, 45269, 96425, 105925, 122873, 148295, 161675, 226345, 614365, 741475, 860111, 1131725, 3071825, 4300555, 21502775]

約数ペア:

[(1, 21502775), (5, 4300555), (7, 3071825), (19, 1131725), (25, 860111), (29, 741475), (35, 614365), (95, 226345), (133, 161675), (145, 148295), (175, 122873), (203, 105925), (223, 96425), (475, 45269), (551, 39025), (665, 32335), (725, 29659), (1015, 21185), (1115, 19285), (1561, 13775), (2755, 7805), (3325, 6467), (3857, 5575), (4237, 5075)]