20998950

素因数分解:

$2^1\times 3^1\times 5^2\times 7^2\times {\mathrm{2857}}^1$

素因数の和:2886

約数の個数: 72

約数和(自身を含む): 60601032

約数和(自身を除く): 39602082

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 49, 50, 70, 75, 98, 105, 147, 150, 175, 210, 245, 294, 350, 490, 525, 735, 1050, 1225, 1470, 2450, 2857, 3675, 5714, 7350, 8571, 14285, 17142, 19999, 28570, 39998, 42855, 59997, 71425, 85710, 99995, 119994, 139993, 142850, 199990, 214275, 279986, 299985, 419979, 428550, 499975, 599970, 699965, 839958, 999950, 1399930, 1499925, 2099895, 2999850, 3499825, 4199790, 6999650, 10499475, 20998950]

約数ペア:

[(1, 20998950), (2, 10499475), (3, 6999650), (5, 4199790), (6, 3499825), (7, 2999850), (10, 2099895), (14, 1499925), (15, 1399930), (21, 999950), (25, 839958), (30, 699965), (35, 599970), (42, 499975), (49, 428550), (50, 419979), (70, 299985), (75, 279986), (98, 214275), (105, 199990), (147, 142850), (150, 139993), (175, 119994), (210, 99995), (245, 85710), (294, 71425), (350, 59997), (490, 42855), (525, 39998), (735, 28570), (1050, 19999), (1225, 17142), (1470, 14285), (2450, 8571), (2857, 7350), (3675, 5714)]