20246120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 27273880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 79, 86, 149, 158, 172, 215, 298, 316, 344, 395, 430, 596, 632, 745, 790, 860, 1192, 1490, 1580, 1720, 2980, 3160, 3397, 5960, 6407, 6794, 11771, 12814, 13588, 16985, 23542, 25628, 27176, 32035, 33970, 47084, 51256, 58855, 64070, 67940, 94168, 117710, 128140, 135880, 235420, 256280, 470840, 506153, 1012306, 2024612, 2530765, 4049224, 5061530, 10123060, 20246120]

約数ペア:

[(1, 20246120), (2, 10123060), (4, 5061530), (5, 4049224), (8, 2530765), (10, 2024612), (20, 1012306), (40, 506153), (43, 470840), (79, 256280), (86, 235420), (149, 135880), (158, 128140), (172, 117710), (215, 94168), (298, 67940), (316, 64070), (344, 58855), (395, 51256), (430, 47084), (596, 33970), (632, 32035), (745, 27176), (790, 25628), (860, 23542), (1192, 16985), (1490, 13588), (1580, 12814), (1720, 11771), (2980, 6794), (3160, 6407), (3397, 5960)]