388996880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{255919}}^1$

素因数の和:255951

約数の個数: 40

約数和(自身を含む): 952022400

約数和(自身を除く): 563025520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 255919, 511838, 1023676, 1279595, 2047352, 2559190, 4094704, 4862461, 5118380, 9724922, 10236760, 19449844, 20473520, 24312305, 38899688, 48624610, 77799376, 97249220, 194498440, 388996880]

約数ペア:

[(1, 388996880), (2, 194498440), (4, 97249220), (5, 77799376), (8, 48624610), (10, 38899688), (16, 24312305), (19, 20473520), (20, 19449844), (38, 10236760), (40, 9724922), (76, 5118380), (80, 4862461), (95, 4094704), (152, 2559190), (190, 2047352), (304, 1279595), (380, 1023676), (760, 511838), (1520, 255919)]