21158800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^2\times {\mathrm{313}}^1$

素因数の和:357

約数の個数: 90

約数和(自身を含む): 55220982

約数和(自身を除く): 34062182

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 169, 200, 208, 260, 313, 325, 338, 400, 520, 626, 650, 676, 845, 1040, 1252, 1300, 1352, 1565, 1690, 2504, 2600, 2704, 3130, 3380, 4069, 4225, 5008, 5200, 6260, 6760, 7825, 8138, 8450, 12520, 13520, 15650, 16276, 16900, 20345, 25040, 31300, 32552, 33800, 40690, 52897, 62600, 65104, 67600, 81380, 101725, 105794, 125200, 162760, 203450, 211588, 264485, 325520, 406900, 423176, 528970, 813800, 846352, 1057940, 1322425, 1627600, 2115880, 2644850, 4231760, 5289700, 10579400, 21158800]

約数ペア:

[(1, 21158800), (2, 10579400), (4, 5289700), (5, 4231760), (8, 2644850), (10, 2115880), (13, 1627600), (16, 1322425), (20, 1057940), (25, 846352), (26, 813800), (40, 528970), (50, 423176), (52, 406900), (65, 325520), (80, 264485), (100, 211588), (104, 203450), (130, 162760), (169, 125200), (200, 105794), (208, 101725), (260, 81380), (313, 67600), (325, 65104), (338, 62600), (400, 52897), (520, 40690), (626, 33800), (650, 32552), (676, 31300), (845, 25040), (1040, 20345), (1252, 16900), (1300, 16276), (1352, 15650), (1565, 13520), (1690, 12520), (2504, 8450), (2600, 8138), (2704, 7825), (3130, 6760), (3380, 6260), (4069, 5200), (4225, 5008)]