21806764

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 47548032

約数和(自身を除く): 25741268

約数列:

[1, 2, 4, 7, 14, 28, 31, 37, 49, 62, 74, 97, 98, 124, 148, 194, 196, 217, 259, 388, 434, 518, 679, 868, 1036, 1147, 1358, 1519, 1813, 2294, 2716, 3007, 3038, 3589, 3626, 4588, 4753, 6014, 6076, 7178, 7252, 8029, 9506, 12028, 14356, 16058, 19012, 21049, 25123, 32116, 42098, 50246, 56203, 84196, 100492, 111259, 112406, 147343, 175861, 222518, 224812, 294686, 351722, 445036, 589372, 703444, 778813, 1557626, 3115252, 5451691, 10903382, 21806764]

約数ペア:

[(1, 21806764), (2, 10903382), (4, 5451691), (7, 3115252), (14, 1557626), (28, 778813), (31, 703444), (37, 589372), (49, 445036), (62, 351722), (74, 294686), (97, 224812), (98, 222518), (124, 175861), (148, 147343), (194, 112406), (196, 111259), (217, 100492), (259, 84196), (388, 56203), (434, 50246), (518, 42098), (679, 32116), (868, 25123), (1036, 21049), (1147, 19012), (1358, 16058), (1519, 14356), (1813, 12028), (2294, 9506), (2716, 8029), (3007, 7252), (3038, 7178), (3589, 6076), (3626, 6014), (4588, 4753)]