21000380205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{47951}}^1$

素因数の和:48106

約数の個数: 64

約数和(自身を含む): 39699652608

約数和(自身を除く): 18699272403

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 97, 105, 129, 215, 291, 301, 485, 645, 679, 903, 1455, 1505, 2037, 3395, 4171, 4515, 10185, 12513, 20855, 29197, 47951, 62565, 87591, 143853, 145985, 239755, 335657, 437955, 719265, 1006971, 1678285, 2061893, 4651247, 5034855, 6185679, 10309465, 13953741, 14433251, 23256235, 30928395, 32558729, 43299753, 69768705, 72166255, 97676187, 162793645, 200003621, 216498765, 488380935, 600010863, 1000018105, 1400025347, 3000054315, 4200076041, 7000126735, 21000380205]

約数ペア:

[(1, 21000380205), (3, 7000126735), (5, 4200076041), (7, 3000054315), (15, 1400025347), (21, 1000018105), (35, 600010863), (43, 488380935), (97, 216498765), (105, 200003621), (129, 162793645), (215, 97676187), (291, 72166255), (301, 69768705), (485, 43299753), (645, 32558729), (679, 30928395), (903, 23256235), (1455, 14433251), (1505, 13953741), (2037, 10309465), (3395, 6185679), (4171, 5034855), (4515, 4651247), (10185, 2061893), (12513, 1678285), (20855, 1006971), (29197, 719265), (47951, 437955), (62565, 335657), (87591, 239755), (143853, 145985)]