19728830

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{97}}^1$

素因数の和:201

約数の個数: 48

約数和(自身を含む): 40071024

約数和(自身を除く): 20342194

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 97, 110, 194, 215, 430, 473, 485, 946, 970, 1067, 1849, 2134, 2365, 3698, 4171, 4730, 5335, 8342, 9245, 10670, 18490, 20339, 20855, 40678, 41710, 45881, 91762, 101695, 179353, 203390, 229405, 358706, 458810, 896765, 1793530, 1972883, 3945766, 9864415, 19728830]

約数ペア:

[(1, 19728830), (2, 9864415), (5, 3945766), (10, 1972883), (11, 1793530), (22, 896765), (43, 458810), (55, 358706), (86, 229405), (97, 203390), (110, 179353), (194, 101695), (215, 91762), (430, 45881), (473, 41710), (485, 40678), (946, 20855), (970, 20339), (1067, 18490), (1849, 10670), (2134, 9245), (2365, 8342), (3698, 5335), (4171, 4730)]