81475840

素因数分解:

$2^8\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1201}}^1$

素因数の和:1275

約数の個数: 72

約数和(自身を含む): 199007928

約数和(自身を除く): 117532088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 256, 265, 320, 424, 530, 640, 848, 1060, 1201, 1280, 1696, 2120, 2402, 3392, 4240, 4804, 6005, 6784, 8480, 9608, 12010, 13568, 16960, 19216, 24020, 33920, 38432, 48040, 63653, 67840, 76864, 96080, 127306, 153728, 192160, 254612, 307456, 318265, 384320, 509224, 636530, 768640, 1018448, 1273060, 1537280, 2036896, 2546120, 4073792, 5092240, 8147584, 10184480, 16295168, 20368960, 40737920, 81475840]

約数ペア:

[(1, 81475840), (2, 40737920), (4, 20368960), (5, 16295168), (8, 10184480), (10, 8147584), (16, 5092240), (20, 4073792), (32, 2546120), (40, 2036896), (53, 1537280), (64, 1273060), (80, 1018448), (106, 768640), (128, 636530), (160, 509224), (212, 384320), (256, 318265), (265, 307456), (320, 254612), (424, 192160), (530, 153728), (640, 127306), (848, 96080), (1060, 76864), (1201, 67840), (1280, 63653), (1696, 48040), (2120, 38432), (2402, 33920), (3392, 24020), (4240, 19216), (4804, 16960), (6005, 13568), (6784, 12010), (8480, 9608)]