21425120

素因数分解:

$2^5\times 5^1\times {\mathrm{359}}^1\times {\mathrm{373}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 50893920

約数和(自身を除く): 29468800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 359, 373, 718, 746, 1436, 1492, 1795, 1865, 2872, 2984, 3590, 3730, 5744, 5968, 7180, 7460, 11488, 11936, 14360, 14920, 28720, 29840, 57440, 59680, 133907, 267814, 535628, 669535, 1071256, 1339070, 2142512, 2678140, 4285024, 5356280, 10712560, 21425120]

約数ペア:

[(1, 21425120), (2, 10712560), (4, 5356280), (5, 4285024), (8, 2678140), (10, 2142512), (16, 1339070), (20, 1071256), (32, 669535), (40, 535628), (80, 267814), (160, 133907), (359, 59680), (373, 57440), (718, 29840), (746, 28720), (1436, 14920), (1492, 14360), (1795, 11936), (1865, 11488), (2872, 7460), (2984, 7180), (3590, 5968), (3730, 5744)]