81511020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1879}}^1$

素因数の和:2135

約数の個数: 72

約数和(自身を含む): 248408160

約数和(自身を除く): 166897140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 241, 482, 723, 964, 1205, 1446, 1879, 2169, 2410, 2892, 3615, 3758, 4338, 4820, 5637, 7230, 7516, 8676, 9395, 10845, 11274, 14460, 16911, 18790, 21690, 22548, 28185, 33822, 37580, 43380, 56370, 67644, 84555, 112740, 169110, 338220, 452839, 905678, 1358517, 1811356, 2264195, 2717034, 4075551, 4528390, 5434068, 6792585, 8151102, 9056780, 13585170, 16302204, 20377755, 27170340, 40755510, 81511020]

約数ペア:

[(1, 81511020), (2, 40755510), (3, 27170340), (4, 20377755), (5, 16302204), (6, 13585170), (9, 9056780), (10, 8151102), (12, 6792585), (15, 5434068), (18, 4528390), (20, 4075551), (30, 2717034), (36, 2264195), (45, 1811356), (60, 1358517), (90, 905678), (180, 452839), (241, 338220), (482, 169110), (723, 112740), (964, 84555), (1205, 67644), (1446, 56370), (1879, 43380), (2169, 37580), (2410, 33822), (2892, 28185), (3615, 22548), (3758, 21690), (4338, 18790), (4820, 16911), (5637, 14460), (7230, 11274), (7516, 10845), (8676, 9395)]