19612720

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4019}}^1$

素因数の和:4093

約数の個数: 40

約数和(自身を含む): 46358640

約数和(自身を除く): 26745920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4019, 4880, 8038, 16076, 20095, 32152, 40190, 64304, 80380, 160760, 245159, 321520, 490318, 980636, 1225795, 1961272, 2451590, 3922544, 4903180, 9806360, 19612720]

約数ペア:

[(1, 19612720), (2, 9806360), (4, 4903180), (5, 3922544), (8, 2451590), (10, 1961272), (16, 1225795), (20, 980636), (40, 490318), (61, 321520), (80, 245159), (122, 160760), (244, 80380), (305, 64304), (488, 40190), (610, 32152), (976, 20095), (1220, 16076), (2440, 8038), (4019, 4880)]