81215360

素因数分解:

$2^7\times 5^1\times {\mathrm{113}}^1\times {\mathrm{1123}}^1$

素因数の和:1255

約数の個数: 64

約数和(自身を含む): 196048080

約数和(自身を除く): 114832720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 113, 128, 160, 226, 320, 452, 565, 640, 904, 1123, 1130, 1808, 2246, 2260, 3616, 4492, 4520, 5615, 7232, 8984, 9040, 11230, 14464, 17968, 18080, 22460, 35936, 36160, 44920, 71872, 72320, 89840, 126899, 143744, 179680, 253798, 359360, 507596, 634495, 718720, 1015192, 1268990, 2030384, 2537980, 4060768, 5075960, 8121536, 10151920, 16243072, 20303840, 40607680, 81215360]

約数ペア:

[(1, 81215360), (2, 40607680), (4, 20303840), (5, 16243072), (8, 10151920), (10, 8121536), (16, 5075960), (20, 4060768), (32, 2537980), (40, 2030384), (64, 1268990), (80, 1015192), (113, 718720), (128, 634495), (160, 507596), (226, 359360), (320, 253798), (452, 179680), (565, 143744), (640, 126899), (904, 89840), (1123, 72320), (1130, 71872), (1808, 44920), (2246, 36160), (2260, 35936), (3616, 22460), (4492, 18080), (4520, 17968), (5615, 14464), (7232, 11230), (8984, 9040)]