78891280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2447}}^1$

素因数の和:2504

約数の個数: 80

約数和(自身を含む): 203986944

約数和(自身を除く): 125095664

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2447, 2480, 3224, 4030, 4894, 6448, 8060, 9788, 12235, 16120, 19576, 24470, 31811, 32240, 39152, 48940, 63622, 75857, 97880, 127244, 151714, 159055, 195760, 254488, 303428, 318110, 379285, 508976, 606856, 636220, 758570, 986141, 1213712, 1272440, 1517140, 1972282, 2544880, 3034280, 3944564, 4930705, 6068560, 7889128, 9861410, 15778256, 19722820, 39445640, 78891280]

約数ペア:

[(1, 78891280), (2, 39445640), (4, 19722820), (5, 15778256), (8, 9861410), (10, 7889128), (13, 6068560), (16, 4930705), (20, 3944564), (26, 3034280), (31, 2544880), (40, 1972282), (52, 1517140), (62, 1272440), (65, 1213712), (80, 986141), (104, 758570), (124, 636220), (130, 606856), (155, 508976), (208, 379285), (248, 318110), (260, 303428), (310, 254488), (403, 195760), (496, 159055), (520, 151714), (620, 127244), (806, 97880), (1040, 75857), (1240, 63622), (1612, 48940), (2015, 39152), (2447, 32240), (2480, 31811), (3224, 24470), (4030, 19576), (4894, 16120), (6448, 12235), (8060, 9788)]