20683880

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:259

約数の個数: 96

約数和(自身を含む): 55342440

約数和(自身を除く): 34658560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 61, 70, 98, 122, 140, 173, 196, 244, 245, 280, 305, 346, 392, 427, 488, 490, 610, 692, 854, 865, 980, 1211, 1220, 1384, 1708, 1730, 1960, 2135, 2422, 2440, 2989, 3416, 3460, 4270, 4844, 5978, 6055, 6920, 8477, 8540, 9688, 10553, 11956, 12110, 14945, 16954, 17080, 21106, 23912, 24220, 29890, 33908, 42212, 42385, 48440, 52765, 59780, 67816, 73871, 84424, 84770, 105530, 119560, 147742, 169540, 211060, 295484, 339080, 369355, 422120, 517097, 590968, 738710, 1034194, 1477420, 2068388, 2585485, 2954840, 4136776, 5170970, 10341940, 20683880]

約数ペア:

[(1, 20683880), (2, 10341940), (4, 5170970), (5, 4136776), (7, 2954840), (8, 2585485), (10, 2068388), (14, 1477420), (20, 1034194), (28, 738710), (35, 590968), (40, 517097), (49, 422120), (56, 369355), (61, 339080), (70, 295484), (98, 211060), (122, 169540), (140, 147742), (173, 119560), (196, 105530), (244, 84770), (245, 84424), (280, 73871), (305, 67816), (346, 59780), (392, 52765), (427, 48440), (488, 42385), (490, 42212), (610, 33908), (692, 29890), (854, 24220), (865, 23912), (980, 21106), (1211, 17080), (1220, 16954), (1384, 14945), (1708, 12110), (1730, 11956), (1960, 10553), (2135, 9688), (2422, 8540), (2440, 8477), (2989, 6920), (3416, 6055), (3460, 5978), (4270, 4844)]