21188420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:213

約数の個数: 96

約数和(自身を含む): 52859520

約数和(自身を除く): 31671100

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 37, 38, 44, 55, 74, 76, 95, 110, 137, 148, 185, 190, 209, 220, 274, 370, 380, 407, 418, 548, 685, 703, 740, 814, 836, 1045, 1370, 1406, 1507, 1628, 2035, 2090, 2603, 2740, 2812, 3014, 3515, 4070, 4180, 5069, 5206, 6028, 7030, 7535, 7733, 8140, 10138, 10412, 13015, 14060, 15070, 15466, 20276, 25345, 26030, 28633, 30140, 30932, 38665, 50690, 52060, 55759, 57266, 77330, 96311, 101380, 111518, 114532, 143165, 154660, 192622, 223036, 278795, 286330, 385244, 481555, 557590, 572660, 963110, 1059421, 1115180, 1926220, 2118842, 4237684, 5297105, 10594210, 21188420]

約数ペア:

[(1, 21188420), (2, 10594210), (4, 5297105), (5, 4237684), (10, 2118842), (11, 1926220), (19, 1115180), (20, 1059421), (22, 963110), (37, 572660), (38, 557590), (44, 481555), (55, 385244), (74, 286330), (76, 278795), (95, 223036), (110, 192622), (137, 154660), (148, 143165), (185, 114532), (190, 111518), (209, 101380), (220, 96311), (274, 77330), (370, 57266), (380, 55759), (407, 52060), (418, 50690), (548, 38665), (685, 30932), (703, 30140), (740, 28633), (814, 26030), (836, 25345), (1045, 20276), (1370, 15466), (1406, 15070), (1507, 14060), (1628, 13015), (2035, 10412), (2090, 10138), (2603, 8140), (2740, 7733), (2812, 7535), (3014, 7030), (3515, 6028), (4070, 5206), (4180, 5069)]