81209940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193357}}^1$

素因数の和:193376

約数の個数: 48

約数和(自身を含む): 259873152

約数和(自身を除く): 178663212

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193357, 386714, 580071, 773428, 966785, 1160142, 1353499, 1933570, 2320284, 2706998, 2900355, 3867140, 4060497, 5413996, 5800710, 6767495, 8120994, 11601420, 13534990, 16241988, 20302485, 27069980, 40604970, 81209940]

約数ペア:

[(1, 81209940), (2, 40604970), (3, 27069980), (4, 20302485), (5, 16241988), (6, 13534990), (7, 11601420), (10, 8120994), (12, 6767495), (14, 5800710), (15, 5413996), (20, 4060497), (21, 3867140), (28, 2900355), (30, 2706998), (35, 2320284), (42, 1933570), (60, 1353499), (70, 1160142), (84, 966785), (105, 773428), (140, 580071), (210, 386714), (420, 193357)]