28820820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{9803}}^1$

素因数の和:9829

約数の個数: 72

約数和(自身を含む): 93883104

約数和(自身を除く): 65062284

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 9803, 19606, 29409, 39212, 49015, 58818, 68621, 98030, 117636, 137242, 147045, 196060, 205863, 274484, 294090, 343105, 411726, 480347, 588180, 686210, 823452, 960694, 1029315, 1372420, 1441041, 1921388, 2058630, 2401735, 2882082, 4117260, 4803470, 5764164, 7205205, 9606940, 14410410, 28820820]

約数ペア:

[(1, 28820820), (2, 14410410), (3, 9606940), (4, 7205205), (5, 5764164), (6, 4803470), (7, 4117260), (10, 2882082), (12, 2401735), (14, 2058630), (15, 1921388), (20, 1441041), (21, 1372420), (28, 1029315), (30, 960694), (35, 823452), (42, 686210), (49, 588180), (60, 480347), (70, 411726), (84, 343105), (98, 294090), (105, 274484), (140, 205863), (147, 196060), (196, 147045), (210, 137242), (245, 117636), (294, 98030), (420, 68621), (490, 58818), (588, 49015), (735, 39212), (980, 29409), (1470, 19606), (2940, 9803)]