215205255

素因数分解:

$3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:390

約数の個数: 80

約数和(自身を含む): 406188288

約数和(自身を除く): 190983033

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 61, 81, 93, 135, 155, 183, 279, 281, 305, 405, 465, 549, 837, 843, 915, 1395, 1405, 1647, 1891, 2511, 2529, 2745, 4185, 4215, 4941, 5673, 7587, 8235, 8711, 9455, 12555, 12645, 17019, 17141, 22761, 24705, 26133, 28365, 37935, 43555, 51057, 51423, 78399, 85095, 85705, 113805, 130665, 153171, 154269, 235197, 255285, 257115, 391995, 462807, 531371, 705591, 765855, 771345, 1175985, 1388421, 1594113, 2314035, 2656855, 3527955, 4782339, 6942105, 7970565, 14347017, 23911695, 43041051, 71735085, 215205255]

約数ペア:

[(1, 215205255), (3, 71735085), (5, 43041051), (9, 23911695), (15, 14347017), (27, 7970565), (31, 6942105), (45, 4782339), (61, 3527955), (81, 2656855), (93, 2314035), (135, 1594113), (155, 1388421), (183, 1175985), (279, 771345), (281, 765855), (305, 705591), (405, 531371), (465, 462807), (549, 391995), (837, 257115), (843, 255285), (915, 235197), (1395, 154269), (1405, 153171), (1647, 130665), (1891, 113805), (2511, 85705), (2529, 85095), (2745, 78399), (4185, 51423), (4215, 51057), (4941, 43555), (5673, 37935), (7587, 28365), (8235, 26133), (8711, 24705), (9455, 22761), (12555, 17141), (12645, 17019)]