211678640

素因数分解:

$2^4\times 5^1\times {\mathrm{661}}^1\times {\mathrm{4003}}^1$

素因数の和:4677

約数の個数: 40

約数和(自身を含む): 493020528

約数和(自身を除く): 281341888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 661, 1322, 2644, 3305, 4003, 5288, 6610, 8006, 10576, 13220, 16012, 20015, 26440, 32024, 40030, 52880, 64048, 80060, 160120, 320240, 2645983, 5291966, 10583932, 13229915, 21167864, 26459830, 42335728, 52919660, 105839320, 211678640]

約数ペア:

[(1, 211678640), (2, 105839320), (4, 52919660), (5, 42335728), (8, 26459830), (10, 21167864), (16, 13229915), (20, 10583932), (40, 5291966), (80, 2645983), (661, 320240), (1322, 160120), (2644, 80060), (3305, 64048), (4003, 52880), (5288, 40030), (6610, 32024), (8006, 26440), (10576, 20015), (13220, 16012)]