399971518

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{647}}^1$

素因数の和:912

約数の個数: 32

約数和(自身を含む): 638254080

約数和(自身を除く): 238282562

約数列:

[1, 2, 23, 46, 89, 151, 178, 302, 647, 1294, 2047, 3473, 4094, 6946, 13439, 14881, 26878, 29762, 57583, 97697, 115166, 195394, 309097, 618194, 1324409, 2247031, 2648818, 4494062, 8695033, 17390066, 199985759, 399971518]

約数ペア:

[(1, 399971518), (2, 199985759), (23, 17390066), (46, 8695033), (89, 4494062), (151, 2648818), (178, 2247031), (302, 1324409), (647, 618194), (1294, 309097), (2047, 195394), (3473, 115166), (4094, 97697), (6946, 57583), (13439, 29762), (14881, 26878)]