1991893540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{6971}}^1$

素因数の和:7157

約数の個数: 96

約数和(自身を含む): 5181813504

約数和(自身を除く): 3189919964

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 157, 182, 260, 314, 364, 455, 628, 785, 910, 1099, 1570, 1820, 2041, 2198, 3140, 4082, 4396, 5495, 6971, 8164, 10205, 10990, 13942, 14287, 20410, 21980, 27884, 28574, 34855, 40820, 48797, 57148, 69710, 71435, 90623, 97594, 139420, 142870, 181246, 195188, 243985, 285740, 362492, 453115, 487970, 634361, 906230, 975940, 1094447, 1268722, 1812460, 2188894, 2537444, 3171805, 4377788, 5472235, 6343610, 7661129, 10944470, 12687220, 14227811, 15322258, 21888940, 28455622, 30644516, 38305645, 56911244, 71139055, 76611290, 99594677, 142278110, 153222580, 199189354, 284556220, 398378708, 497973385, 995946770, 1991893540]

約数ペア:

[(1, 1991893540), (2, 995946770), (4, 497973385), (5, 398378708), (7, 284556220), (10, 199189354), (13, 153222580), (14, 142278110), (20, 99594677), (26, 76611290), (28, 71139055), (35, 56911244), (52, 38305645), (65, 30644516), (70, 28455622), (91, 21888940), (130, 15322258), (140, 14227811), (157, 12687220), (182, 10944470), (260, 7661129), (314, 6343610), (364, 5472235), (455, 4377788), (628, 3171805), (785, 2537444), (910, 2188894), (1099, 1812460), (1570, 1268722), (1820, 1094447), (2041, 975940), (2198, 906230), (3140, 634361), (4082, 487970), (4396, 453115), (5495, 362492), (6971, 285740), (8164, 243985), (10205, 195188), (10990, 181246), (13942, 142870), (14287, 139420), (20410, 97594), (21980, 90623), (27884, 71435), (28574, 69710), (34855, 57148), (40820, 48797)]