213016840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1\times {\mathrm{457}}^1$

素因数の和:782

約数の個数: 64

約数和(自身を含む): 493320960

約数和(自身を除く): 280304120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 271, 344, 430, 457, 542, 860, 914, 1084, 1355, 1720, 1828, 2168, 2285, 2710, 3656, 4570, 5420, 9140, 10840, 11653, 18280, 19651, 23306, 39302, 46612, 58265, 78604, 93224, 98255, 116530, 123847, 157208, 196510, 233060, 247694, 393020, 466120, 495388, 619235, 786040, 990776, 1238470, 2476940, 4953880, 5325421, 10650842, 21301684, 26627105, 42603368, 53254210, 106508420, 213016840]

約数ペア:

[(1, 213016840), (2, 106508420), (4, 53254210), (5, 42603368), (8, 26627105), (10, 21301684), (20, 10650842), (40, 5325421), (43, 4953880), (86, 2476940), (172, 1238470), (215, 990776), (271, 786040), (344, 619235), (430, 495388), (457, 466120), (542, 393020), (860, 247694), (914, 233060), (1084, 196510), (1355, 157208), (1720, 123847), (1828, 116530), (2168, 98255), (2285, 93224), (2710, 78604), (3656, 58265), (4570, 46612), (5420, 39302), (9140, 23306), (10840, 19651), (11653, 18280)]