20111775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 35354880

約数和(自身を除く): 15243105

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 89, 115, 131, 267, 345, 393, 445, 575, 655, 1335, 1725, 1965, 2047, 2225, 3013, 3275, 6141, 6675, 9039, 9825, 10235, 11659, 15065, 30705, 34977, 45195, 51175, 58295, 75325, 153525, 174885, 225975, 268157, 291475, 804471, 874425, 1340785, 4022355, 6703925, 20111775]

約数ペア:

[(1, 20111775), (3, 6703925), (5, 4022355), (15, 1340785), (23, 874425), (25, 804471), (69, 291475), (75, 268157), (89, 225975), (115, 174885), (131, 153525), (267, 75325), (345, 58295), (393, 51175), (445, 45195), (575, 34977), (655, 30705), (1335, 15065), (1725, 11659), (1965, 10235), (2047, 9825), (2225, 9039), (3013, 6675), (3275, 6141)]