20789929900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{523}}^1\times {\mathrm{12823}}^1$

素因数の和:13391

約数の個数: 72

約数和(自身を含む): 46662124544

約数和(自身を除く): 25872194644

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 310, 523, 620, 775, 1046, 1550, 2092, 2615, 3100, 5230, 10460, 12823, 13075, 16213, 25646, 26150, 32426, 51292, 52300, 64115, 64852, 81065, 128230, 162130, 256460, 320575, 324260, 397513, 405325, 641150, 795026, 810650, 1282300, 1590052, 1621300, 1987565, 3975130, 6706429, 7950260, 9937825, 13412858, 19875650, 26825716, 33532145, 39751300, 67064290, 134128580, 167660725, 207899299, 335321450, 415798598, 670642900, 831597196, 1039496495, 2078992990, 4157985980, 5197482475, 10394964950, 20789929900]

約数ペア:

[(1, 20789929900), (2, 10394964950), (4, 5197482475), (5, 4157985980), (10, 2078992990), (20, 1039496495), (25, 831597196), (31, 670642900), (50, 415798598), (62, 335321450), (100, 207899299), (124, 167660725), (155, 134128580), (310, 67064290), (523, 39751300), (620, 33532145), (775, 26825716), (1046, 19875650), (1550, 13412858), (2092, 9937825), (2615, 7950260), (3100, 6706429), (5230, 3975130), (10460, 1987565), (12823, 1621300), (13075, 1590052), (16213, 1282300), (25646, 810650), (26150, 795026), (32426, 641150), (51292, 405325), (52300, 397513), (64115, 324260), (64852, 320575), (81065, 256460), (128230, 162130)]