19873360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 50528016

約数和(自身を除く): 30654656

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 97, 104, 130, 194, 197, 208, 260, 388, 394, 485, 520, 776, 788, 970, 985, 1040, 1261, 1552, 1576, 1940, 1970, 2522, 2561, 3152, 3880, 3940, 5044, 5122, 6305, 7760, 7880, 10088, 10244, 12610, 12805, 15760, 19109, 20176, 20488, 25220, 25610, 38218, 40976, 50440, 51220, 76436, 95545, 100880, 102440, 152872, 191090, 204880, 248417, 305744, 382180, 496834, 764360, 993668, 1242085, 1528720, 1987336, 2484170, 3974672, 4968340, 9936680, 19873360]

約数ペア:

[(1, 19873360), (2, 9936680), (4, 4968340), (5, 3974672), (8, 2484170), (10, 1987336), (13, 1528720), (16, 1242085), (20, 993668), (26, 764360), (40, 496834), (52, 382180), (65, 305744), (80, 248417), (97, 204880), (104, 191090), (130, 152872), (194, 102440), (197, 100880), (208, 95545), (260, 76436), (388, 51220), (394, 50440), (485, 40976), (520, 38218), (776, 25610), (788, 25220), (970, 20488), (985, 20176), (1040, 19109), (1261, 15760), (1552, 12805), (1576, 12610), (1940, 10244), (1970, 10088), (2522, 7880), (2561, 7760), (3152, 6305), (3880, 5122), (3940, 5044)]