20913351440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{859}}^1\times {\mathrm{9817}}^1$

素因数の和:10720

約数の個数: 80

約数和(自身を含む): 50255592960

約数和(自身を除く): 29342241520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 859, 1240, 1718, 2480, 3436, 4295, 6872, 8590, 9817, 13744, 17180, 19634, 26629, 34360, 39268, 49085, 53258, 68720, 78536, 98170, 106516, 133145, 157072, 196340, 213032, 266290, 304327, 392680, 426064, 532580, 608654, 785360, 1065160, 1217308, 1521635, 2130320, 2434616, 3043270, 4869232, 6086540, 8432803, 12173080, 16865606, 24346160, 33731212, 42164015, 67462424, 84328030, 134924848, 168656060, 261416893, 337312120, 522833786, 674624240, 1045667572, 1307084465, 2091335144, 2614168930, 4182670288, 5228337860, 10456675720, 20913351440]

約数ペア:

[(1, 20913351440), (2, 10456675720), (4, 5228337860), (5, 4182670288), (8, 2614168930), (10, 2091335144), (16, 1307084465), (20, 1045667572), (31, 674624240), (40, 522833786), (62, 337312120), (80, 261416893), (124, 168656060), (155, 134924848), (248, 84328030), (310, 67462424), (496, 42164015), (620, 33731212), (859, 24346160), (1240, 16865606), (1718, 12173080), (2480, 8432803), (3436, 6086540), (4295, 4869232), (6872, 3043270), (8590, 2434616), (9817, 2130320), (13744, 1521635), (17180, 1217308), (19634, 1065160), (26629, 785360), (34360, 608654), (39268, 532580), (49085, 426064), (53258, 392680), (68720, 304327), (78536, 266290), (98170, 213032), (106516, 196340), (133145, 157072)]