20981904

素因数分解:

$2^4\times 3^1\times {\mathrm{271}}^1\times {\mathrm{1613}}^1$

素因数の和:1895

約数の個数: 40

約数和(自身を含む): 54436992

約数和(自身を除く): 33455088

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 271, 542, 813, 1084, 1613, 1626, 2168, 3226, 3252, 4336, 4839, 6452, 6504, 9678, 12904, 13008, 19356, 25808, 38712, 77424, 437123, 874246, 1311369, 1748492, 2622738, 3496984, 5245476, 6993968, 10490952, 20981904]

約数ペア:

[(1, 20981904), (2, 10490952), (3, 6993968), (4, 5245476), (6, 3496984), (8, 2622738), (12, 1748492), (16, 1311369), (24, 874246), (48, 437123), (271, 77424), (542, 38712), (813, 25808), (1084, 19356), (1613, 13008), (1626, 12904), (2168, 9678), (3226, 6504), (3252, 6452), (4336, 4839)]