21009730

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{809}}^1$

素因数の和:883

約数の個数: 48

約数和(自身を含む): 44877240

約数和(自身を除く): 23867510

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 53, 70, 98, 106, 245, 265, 371, 490, 530, 742, 809, 1618, 1855, 2597, 3710, 4045, 5194, 5663, 8090, 11326, 12985, 25970, 28315, 39641, 42877, 56630, 79282, 85754, 198205, 214385, 300139, 396410, 428770, 600278, 1500695, 2100973, 3001390, 4201946, 10504865, 21009730]

約数ペア:

[(1, 21009730), (2, 10504865), (5, 4201946), (7, 3001390), (10, 2100973), (14, 1500695), (35, 600278), (49, 428770), (53, 396410), (70, 300139), (98, 214385), (106, 198205), (245, 85754), (265, 79282), (371, 56630), (490, 42877), (530, 39641), (742, 28315), (809, 25970), (1618, 12985), (1855, 11326), (2597, 8090), (3710, 5663), (4045, 5194)]