21481605

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:136

約数の個数: 80

約数和(自身を含む): 41817600

約数和(自身を除く): 20335995

約数列:

[1, 3, 5, 9, 15, 27, 29, 31, 45, 59, 81, 87, 93, 135, 145, 155, 177, 261, 279, 295, 405, 435, 465, 531, 783, 837, 885, 899, 1305, 1395, 1593, 1711, 1829, 2349, 2511, 2655, 2697, 3915, 4185, 4495, 4779, 5133, 5487, 7965, 8091, 8555, 9145, 11745, 12555, 13485, 15399, 16461, 23895, 24273, 25665, 27435, 40455, 46197, 49383, 53041, 72819, 76995, 82305, 121365, 138591, 148149, 159123, 230985, 246915, 265205, 364095, 477369, 692955, 740745, 795615, 1432107, 2386845, 4296321, 7160535, 21481605]

約数ペア:

[(1, 21481605), (3, 7160535), (5, 4296321), (9, 2386845), (15, 1432107), (27, 795615), (29, 740745), (31, 692955), (45, 477369), (59, 364095), (81, 265205), (87, 246915), (93, 230985), (135, 159123), (145, 148149), (155, 138591), (177, 121365), (261, 82305), (279, 76995), (295, 72819), (405, 53041), (435, 49383), (465, 46197), (531, 40455), (783, 27435), (837, 25665), (885, 24273), (899, 23895), (1305, 16461), (1395, 15399), (1593, 13485), (1711, 12555), (1829, 11745), (2349, 9145), (2511, 8555), (2655, 8091), (2697, 7965), (3915, 5487), (4185, 5133), (4495, 4779)]