21247383745

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1\times {\mathrm{2617}}^1$

素因数の和:3098

約数の個数: 64

約数和(自身を含む): 31818124800

約数和(自身を除く): 10570741055

約数列:

[1, 5, 7, 19, 29, 35, 95, 133, 145, 203, 421, 551, 665, 1015, 2105, 2617, 2755, 2947, 3857, 7999, 12209, 13085, 14735, 18319, 19285, 39995, 49723, 55993, 61045, 75893, 85463, 91595, 231971, 248615, 279965, 348061, 379465, 427315, 531251, 1101757, 1159855, 1441967, 1623797, 1740305, 2656255, 5508785, 7209835, 7712299, 8118985, 10093769, 20933383, 31950953, 38561495, 50468845, 104666915, 146533681, 159754765, 223656671, 607068107, 732668405, 1118283355, 3035340535, 4249476749, 21247383745]

約数ペア:

[(1, 21247383745), (5, 4249476749), (7, 3035340535), (19, 1118283355), (29, 732668405), (35, 607068107), (95, 223656671), (133, 159754765), (145, 146533681), (203, 104666915), (421, 50468845), (551, 38561495), (665, 31950953), (1015, 20933383), (2105, 10093769), (2617, 8118985), (2755, 7712299), (2947, 7209835), (3857, 5508785), (7999, 2656255), (12209, 1740305), (13085, 1623797), (14735, 1441967), (18319, 1159855), (19285, 1101757), (39995, 531251), (49723, 427315), (55993, 379465), (61045, 348061), (75893, 279965), (85463, 248615), (91595, 231971)]