21052521

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17654679

約数列:

[1, 3, 7, 9, 21, 23, 27, 29, 63, 69, 87, 161, 167, 189, 203, 207, 261, 483, 501, 609, 621, 667, 783, 1169, 1449, 1503, 1827, 2001, 3507, 3841, 4347, 4509, 4669, 4843, 5481, 6003, 10521, 11523, 14007, 14529, 18009, 26887, 31563, 33901, 34569, 42021, 43587, 80661, 101703, 103707, 111389, 126063, 130761, 241983, 305109, 334167, 725949, 779723, 915327, 1002501, 2339169, 3007503, 7017507, 21052521]

約数ペア:

[(1, 21052521), (3, 7017507), (7, 3007503), (9, 2339169), (21, 1002501), (23, 915327), (27, 779723), (29, 725949), (63, 334167), (69, 305109), (87, 241983), (161, 130761), (167, 126063), (189, 111389), (203, 103707), (207, 101703), (261, 80661), (483, 43587), (501, 42021), (609, 34569), (621, 33901), (667, 31563), (783, 26887), (1169, 18009), (1449, 14529), (1503, 14007), (1827, 11523), (2001, 10521), (3507, 6003), (3841, 5481), (4347, 4843), (4509, 4669)]