21124960

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6949}}^1$

素因数の和:6983

約数の個数: 48

約数和(自身を含む): 52542000

約数和(自身を除く): 31417040

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6949, 13898, 27796, 34745, 55592, 69490, 111184, 132031, 138980, 222368, 264062, 277960, 528124, 555920, 660155, 1056248, 1111840, 1320310, 2112496, 2640620, 4224992, 5281240, 10562480, 21124960]

約数ペア:

[(1, 21124960), (2, 10562480), (4, 5281240), (5, 4224992), (8, 2640620), (10, 2112496), (16, 1320310), (19, 1111840), (20, 1056248), (32, 660155), (38, 555920), (40, 528124), (76, 277960), (80, 264062), (95, 222368), (152, 138980), (160, 132031), (190, 111184), (304, 69490), (380, 55592), (608, 34745), (760, 27796), (1520, 13898), (3040, 6949)]