18781880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1901}}^1$

素因数の和:1944

約数の個数: 64

約数和(自身を含む): 47930400

約数和(自身を除く): 29148520

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1901, 1976, 2470, 3802, 4940, 7604, 9505, 9880, 15208, 19010, 24713, 36119, 38020, 49426, 72238, 76040, 98852, 123565, 144476, 180595, 197704, 247130, 288952, 361190, 469547, 494260, 722380, 939094, 988520, 1444760, 1878188, 2347735, 3756376, 4695470, 9390940, 18781880]

約数ペア:

[(1, 18781880), (2, 9390940), (4, 4695470), (5, 3756376), (8, 2347735), (10, 1878188), (13, 1444760), (19, 988520), (20, 939094), (26, 722380), (38, 494260), (40, 469547), (52, 361190), (65, 288952), (76, 247130), (95, 197704), (104, 180595), (130, 144476), (152, 123565), (190, 98852), (247, 76040), (260, 72238), (380, 49426), (494, 38020), (520, 36119), (760, 24713), (988, 19010), (1235, 15208), (1901, 9880), (1976, 9505), (2470, 7604), (3802, 4940)]