20115880

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{83}}^2$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 46440180

約数和(自身を除く): 26324300

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 83, 146, 166, 292, 332, 365, 415, 584, 664, 730, 830, 1460, 1660, 2920, 3320, 6059, 6889, 12118, 13778, 24236, 27556, 30295, 34445, 48472, 55112, 60590, 68890, 121180, 137780, 242360, 275560, 502897, 1005794, 2011588, 2514485, 4023176, 5028970, 10057940, 20115880]

約数ペア:

[(1, 20115880), (2, 10057940), (4, 5028970), (5, 4023176), (8, 2514485), (10, 2011588), (20, 1005794), (40, 502897), (73, 275560), (83, 242360), (146, 137780), (166, 121180), (292, 68890), (332, 60590), (365, 55112), (415, 48472), (584, 34445), (664, 30295), (730, 27556), (830, 24236), (1460, 13778), (1660, 12118), (2920, 6889), (3320, 6059)]