20921502560

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2668559}}^1$

素因数の和:2668588

約数の個数: 72

約数和(自身を含む): 57496793760

約数和(自身を除く): 36575291200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 2668559, 5337118, 10674236, 13342795, 18679913, 21348472, 26685590, 37359826, 42696944, 53371180, 74719652, 85393888, 93399565, 106742360, 130759391, 149439304, 186799130, 213484720, 261518782, 298878608, 373598260, 426969440, 523037564, 597757216, 653796955, 747196520, 1046075128, 1307593910, 1494393040, 2092150256, 2615187820, 2988786080, 4184300512, 5230375640, 10460751280, 20921502560]

約数ペア:

[(1, 20921502560), (2, 10460751280), (4, 5230375640), (5, 4184300512), (7, 2988786080), (8, 2615187820), (10, 2092150256), (14, 1494393040), (16, 1307593910), (20, 1046075128), (28, 747196520), (32, 653796955), (35, 597757216), (40, 523037564), (49, 426969440), (56, 373598260), (70, 298878608), (80, 261518782), (98, 213484720), (112, 186799130), (140, 149439304), (160, 130759391), (196, 106742360), (224, 93399565), (245, 85393888), (280, 74719652), (392, 53371180), (490, 42696944), (560, 37359826), (784, 26685590), (980, 21348472), (1120, 18679913), (1568, 13342795), (1960, 10674236), (3920, 5337118), (7840, 2668559)]