21238518

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:301

約数の個数: 64

約数和(自身を含む): 50780160

約数和(自身を除く): 29541642

約数列:

[1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 79, 111, 158, 173, 222, 237, 259, 346, 474, 518, 519, 553, 777, 1038, 1106, 1211, 1554, 1659, 2422, 2923, 3318, 3633, 5846, 6401, 7266, 8769, 12802, 13667, 17538, 19203, 20461, 27334, 38406, 40922, 41001, 44807, 61383, 82002, 89614, 95669, 122766, 134421, 191338, 268842, 287007, 505679, 574014, 1011358, 1517037, 3034074, 3539753, 7079506, 10619259, 21238518]

約数ペア:

[(1, 21238518), (2, 10619259), (3, 7079506), (6, 3539753), (7, 3034074), (14, 1517037), (21, 1011358), (37, 574014), (42, 505679), (74, 287007), (79, 268842), (111, 191338), (158, 134421), (173, 122766), (222, 95669), (237, 89614), (259, 82002), (346, 61383), (474, 44807), (518, 41001), (519, 40922), (553, 38406), (777, 27334), (1038, 20461), (1106, 19203), (1211, 17538), (1554, 13667), (1659, 12802), (2422, 8769), (2923, 7266), (3318, 6401), (3633, 5846)]