21968560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 54684000

約数和(自身を除く): 32715440

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 97, 149, 152, 190, 194, 298, 304, 380, 388, 485, 596, 745, 760, 776, 970, 1192, 1490, 1520, 1552, 1843, 1940, 2384, 2831, 2980, 3686, 3880, 5662, 5960, 7372, 7760, 9215, 11324, 11920, 14155, 14453, 14744, 18430, 22648, 28310, 28906, 29488, 36860, 45296, 56620, 57812, 72265, 73720, 113240, 115624, 144530, 147440, 226480, 231248, 274607, 289060, 549214, 578120, 1098428, 1156240, 1373035, 2196856, 2746070, 4393712, 5492140, 10984280, 21968560]

約数ペア:

[(1, 21968560), (2, 10984280), (4, 5492140), (5, 4393712), (8, 2746070), (10, 2196856), (16, 1373035), (19, 1156240), (20, 1098428), (38, 578120), (40, 549214), (76, 289060), (80, 274607), (95, 231248), (97, 226480), (149, 147440), (152, 144530), (190, 115624), (194, 113240), (298, 73720), (304, 72265), (380, 57812), (388, 56620), (485, 45296), (596, 36860), (745, 29488), (760, 28906), (776, 28310), (970, 22648), (1192, 18430), (1490, 14744), (1520, 14453), (1552, 14155), (1843, 11920), (1940, 11324), (2384, 9215), (2831, 7760), (2980, 7372), (3686, 5960), (3880, 5662)]