21000355020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{783011}}^1$

素因数の和:783175

約数の個数: 72

約数和(自身を含む): 64128682800

約数和(自身を除く): 43128327780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 149, 180, 298, 447, 596, 745, 894, 1341, 1490, 1788, 2235, 2682, 2980, 4470, 5364, 6705, 8940, 13410, 26820, 783011, 1566022, 2349033, 3132044, 3915055, 4698066, 7047099, 7830110, 9396132, 11745165, 14094198, 15660220, 23490330, 28188396, 35235495, 46980660, 70470990, 116668639, 140941980, 233337278, 350005917, 466674556, 583343195, 700011834, 1050017751, 1166686390, 1400023668, 1750029585, 2100035502, 2333372780, 3500059170, 4200071004, 5250088755, 7000118340, 10500177510, 21000355020]

約数ペア:

[(1, 21000355020), (2, 10500177510), (3, 7000118340), (4, 5250088755), (5, 4200071004), (6, 3500059170), (9, 2333372780), (10, 2100035502), (12, 1750029585), (15, 1400023668), (18, 1166686390), (20, 1050017751), (30, 700011834), (36, 583343195), (45, 466674556), (60, 350005917), (90, 233337278), (149, 140941980), (180, 116668639), (298, 70470990), (447, 46980660), (596, 35235495), (745, 28188396), (894, 23490330), (1341, 15660220), (1490, 14094198), (1788, 11745165), (2235, 9396132), (2682, 7830110), (2980, 7047099), (4470, 4698066), (5364, 3915055), (6705, 3132044), (8940, 2349033), (13410, 1566022), (26820, 783011)]