21618272

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{331}}^1$

素因数の和:511

約数の個数: 48

約数和(自身を含む): 46266192

約数和(自身を除く): 24647920

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 157, 208, 314, 331, 416, 628, 662, 1256, 1324, 2041, 2512, 2648, 4082, 4303, 5024, 5296, 8164, 8606, 10592, 16328, 17212, 32656, 34424, 51967, 65312, 68848, 103934, 137696, 207868, 415736, 675571, 831472, 1351142, 1662944, 2702284, 5404568, 10809136, 21618272]

約数ペア:

[(1, 21618272), (2, 10809136), (4, 5404568), (8, 2702284), (13, 1662944), (16, 1351142), (26, 831472), (32, 675571), (52, 415736), (104, 207868), (157, 137696), (208, 103934), (314, 68848), (331, 65312), (416, 51967), (628, 34424), (662, 32656), (1256, 17212), (1324, 16328), (2041, 10592), (2512, 8606), (2648, 8164), (4082, 5296), (4303, 5024)]