20388020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{157}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 44381568

約数和(自身を除く): 23993548

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 151, 157, 172, 215, 302, 314, 430, 604, 628, 755, 785, 860, 1510, 1570, 3020, 3140, 6493, 6751, 12986, 13502, 23707, 25972, 27004, 32465, 33755, 47414, 64930, 67510, 94828, 118535, 129860, 135020, 237070, 474140, 1019401, 2038802, 4077604, 5097005, 10194010, 20388020]

約数ペア:

[(1, 20388020), (2, 10194010), (4, 5097005), (5, 4077604), (10, 2038802), (20, 1019401), (43, 474140), (86, 237070), (151, 135020), (157, 129860), (172, 118535), (215, 94828), (302, 67510), (314, 64930), (430, 47414), (604, 33755), (628, 32465), (755, 27004), (785, 25972), (860, 23707), (1510, 13502), (1570, 12986), (3020, 6751), (3140, 6493)]