20719725

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 16777875

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 79, 195, 237, 269, 325, 395, 807, 975, 1027, 1185, 1345, 1975, 3081, 3497, 4035, 5135, 5925, 6725, 10491, 15405, 17485, 20175, 21251, 25675, 52455, 63753, 77025, 87425, 106255, 262275, 276263, 318765, 531275, 828789, 1381315, 1593825, 4143945, 6906575, 20719725]

約数ペア:

[(1, 20719725), (3, 6906575), (5, 4143945), (13, 1593825), (15, 1381315), (25, 828789), (39, 531275), (65, 318765), (75, 276263), (79, 262275), (195, 106255), (237, 87425), (269, 77025), (325, 63753), (395, 52455), (807, 25675), (975, 21251), (1027, 20175), (1185, 17485), (1345, 15405), (1975, 10491), (3081, 6725), (3497, 5925), (4035, 5135)]