21035980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:215

約数の個数: 96

約数和(自身を含む): 53932032

約数和(自身を除く): 32896052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 37, 62, 70, 74, 124, 131, 140, 148, 155, 185, 217, 259, 262, 310, 370, 434, 518, 524, 620, 655, 740, 868, 917, 1036, 1085, 1147, 1295, 1310, 1834, 2170, 2294, 2590, 2620, 3668, 4061, 4340, 4585, 4588, 4847, 5180, 5735, 8029, 8122, 9170, 9694, 11470, 16058, 16244, 18340, 19388, 20305, 22940, 24235, 28427, 32116, 33929, 40145, 40610, 48470, 56854, 67858, 80290, 81220, 96940, 113708, 135716, 142135, 150257, 160580, 169645, 284270, 300514, 339290, 568540, 601028, 678580, 751285, 1051799, 1502570, 2103598, 3005140, 4207196, 5258995, 10517990, 21035980]

約数ペア:

[(1, 21035980), (2, 10517990), (4, 5258995), (5, 4207196), (7, 3005140), (10, 2103598), (14, 1502570), (20, 1051799), (28, 751285), (31, 678580), (35, 601028), (37, 568540), (62, 339290), (70, 300514), (74, 284270), (124, 169645), (131, 160580), (140, 150257), (148, 142135), (155, 135716), (185, 113708), (217, 96940), (259, 81220), (262, 80290), (310, 67858), (370, 56854), (434, 48470), (518, 40610), (524, 40145), (620, 33929), (655, 32116), (740, 28427), (868, 24235), (917, 22940), (1036, 20305), (1085, 19388), (1147, 18340), (1295, 16244), (1310, 16058), (1834, 11470), (2170, 9694), (2294, 9170), (2590, 8122), (2620, 8029), (3668, 5735), (4061, 5180), (4340, 4847), (4585, 4588)]