20980680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{24977}}^1$

素因数の和:24998

約数の個数: 64

約数和(自身を含む): 71936640

約数和(自身を除く): 50955960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 24977, 49954, 74931, 99908, 124885, 149862, 174839, 199816, 249770, 299724, 349678, 374655, 499540, 524517, 599448, 699356, 749310, 874195, 999080, 1049034, 1398712, 1498620, 1748390, 2098068, 2622585, 2997240, 3496780, 4196136, 5245170, 6993560, 10490340, 20980680]

約数ペア:

[(1, 20980680), (2, 10490340), (3, 6993560), (4, 5245170), (5, 4196136), (6, 3496780), (7, 2997240), (8, 2622585), (10, 2098068), (12, 1748390), (14, 1498620), (15, 1398712), (20, 1049034), (21, 999080), (24, 874195), (28, 749310), (30, 699356), (35, 599448), (40, 524517), (42, 499540), (56, 374655), (60, 349678), (70, 299724), (84, 249770), (105, 199816), (120, 174839), (140, 149862), (168, 124885), (210, 99908), (280, 74931), (420, 49954), (840, 24977)]