20919760

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13763}}^1$

素因数の和:13795

約数の個数: 40

約数和(自身を含む): 51202080

約数和(自身を除く): 30282320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13763, 27526, 55052, 68815, 110104, 137630, 220208, 261497, 275260, 522994, 550520, 1045988, 1101040, 1307485, 2091976, 2614970, 4183952, 5229940, 10459880, 20919760]

約数ペア:

[(1, 20919760), (2, 10459880), (4, 5229940), (5, 4183952), (8, 2614970), (10, 2091976), (16, 1307485), (19, 1101040), (20, 1045988), (38, 550520), (40, 522994), (76, 275260), (80, 261497), (95, 220208), (152, 137630), (190, 110104), (304, 68815), (380, 55052), (760, 27526), (1520, 13763)]