21990023080

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{138163}}^1$

素因数の和:138370

約数の個数: 64

約数和(自身を含む): 51927557760

約数和(自身を除く): 29937534680

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 173, 184, 230, 346, 460, 692, 865, 920, 1384, 1730, 3460, 3979, 6920, 7958, 15916, 19895, 31832, 39790, 79580, 138163, 159160, 276326, 552652, 690815, 1105304, 1381630, 2763260, 3177749, 5526520, 6355498, 12710996, 15888745, 23902199, 25421992, 31777490, 47804398, 63554980, 95608796, 119510995, 127109960, 191217592, 239021990, 478043980, 549750577, 956087960, 1099501154, 2199002308, 2748752885, 4398004616, 5497505770, 10995011540, 21990023080]

約数ペア:

[(1, 21990023080), (2, 10995011540), (4, 5497505770), (5, 4398004616), (8, 2748752885), (10, 2199002308), (20, 1099501154), (23, 956087960), (40, 549750577), (46, 478043980), (92, 239021990), (115, 191217592), (173, 127109960), (184, 119510995), (230, 95608796), (346, 63554980), (460, 47804398), (692, 31777490), (865, 25421992), (920, 23902199), (1384, 15888745), (1730, 12710996), (3460, 6355498), (3979, 5526520), (6920, 3177749), (7958, 2763260), (15916, 1381630), (19895, 1105304), (31832, 690815), (39790, 552652), (79580, 276326), (138163, 159160)]