18993520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2609}}^1$

素因数の和:2642

約数の個数: 80

約数和(自身を含む): 54371520

約数和(自身を除く): 35378000

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2609, 3640, 5218, 7280, 10436, 13045, 18263, 20872, 26090, 33917, 36526, 41744, 52180, 67834, 73052, 91315, 104360, 135668, 146104, 169585, 182630, 208720, 237419, 271336, 292208, 339170, 365260, 474838, 542672, 678340, 730520, 949676, 1187095, 1356680, 1461040, 1899352, 2374190, 2713360, 3798704, 4748380, 9496760, 18993520]

約数ペア:

[(1, 18993520), (2, 9496760), (4, 4748380), (5, 3798704), (7, 2713360), (8, 2374190), (10, 1899352), (13, 1461040), (14, 1356680), (16, 1187095), (20, 949676), (26, 730520), (28, 678340), (35, 542672), (40, 474838), (52, 365260), (56, 339170), (65, 292208), (70, 271336), (80, 237419), (91, 208720), (104, 182630), (112, 169585), (130, 146104), (140, 135668), (182, 104360), (208, 91315), (260, 73052), (280, 67834), (364, 52180), (455, 41744), (520, 36526), (560, 33917), (728, 26090), (910, 20872), (1040, 18263), (1456, 13045), (1820, 10436), (2609, 7280), (3640, 5218)]