21390960

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{4691}}^1$

素因数の和:4726

約数の個数: 80

約数和(自身を含む): 69816960

約数和(自身を除く): 48426000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 19, 20, 24, 30, 38, 40, 48, 57, 60, 76, 80, 95, 114, 120, 152, 190, 228, 240, 285, 304, 380, 456, 570, 760, 912, 1140, 1520, 2280, 4560, 4691, 9382, 14073, 18764, 23455, 28146, 37528, 46910, 56292, 70365, 75056, 89129, 93820, 112584, 140730, 178258, 187640, 225168, 267387, 281460, 356516, 375280, 445645, 534774, 562920, 713032, 891290, 1069548, 1125840, 1336935, 1426064, 1782580, 2139096, 2673870, 3565160, 4278192, 5347740, 7130320, 10695480, 21390960]

約数ペア:

[(1, 21390960), (2, 10695480), (3, 7130320), (4, 5347740), (5, 4278192), (6, 3565160), (8, 2673870), (10, 2139096), (12, 1782580), (15, 1426064), (16, 1336935), (19, 1125840), (20, 1069548), (24, 891290), (30, 713032), (38, 562920), (40, 534774), (48, 445645), (57, 375280), (60, 356516), (76, 281460), (80, 267387), (95, 225168), (114, 187640), (120, 178258), (152, 140730), (190, 112584), (228, 93820), (240, 89129), (285, 75056), (304, 70365), (380, 56292), (456, 46910), (570, 37528), (760, 28146), (912, 23455), (1140, 18764), (1520, 14073), (2280, 9382), (4560, 4691)]