19885880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:157

約数の個数: 128

約数和(自身を含む): 55296000

約数和(自身を除く): 35410120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 31, 35, 40, 56, 58, 62, 70, 79, 116, 124, 140, 145, 155, 158, 203, 217, 232, 248, 280, 290, 310, 316, 395, 406, 434, 553, 580, 620, 632, 790, 812, 868, 899, 1015, 1085, 1106, 1160, 1240, 1580, 1624, 1736, 1798, 2030, 2170, 2212, 2291, 2449, 2765, 3160, 3596, 4060, 4340, 4424, 4495, 4582, 4898, 5530, 6293, 7192, 8120, 8680, 8990, 9164, 9796, 11060, 11455, 12245, 12586, 16037, 17143, 17980, 18328, 19592, 22120, 22910, 24490, 25172, 31465, 32074, 34286, 35960, 45820, 48980, 50344, 62930, 64148, 68572, 71021, 80185, 85715, 91640, 97960, 125860, 128296, 137144, 142042, 160370, 171430, 251720, 284084, 320740, 342860, 355105, 497147, 568168, 641480, 685720, 710210, 994294, 1420420, 1988588, 2485735, 2840840, 3977176, 4971470, 9942940, 19885880]

約数ペア:

[(1, 19885880), (2, 9942940), (4, 4971470), (5, 3977176), (7, 2840840), (8, 2485735), (10, 1988588), (14, 1420420), (20, 994294), (28, 710210), (29, 685720), (31, 641480), (35, 568168), (40, 497147), (56, 355105), (58, 342860), (62, 320740), (70, 284084), (79, 251720), (116, 171430), (124, 160370), (140, 142042), (145, 137144), (155, 128296), (158, 125860), (203, 97960), (217, 91640), (232, 85715), (248, 80185), (280, 71021), (290, 68572), (310, 64148), (316, 62930), (395, 50344), (406, 48980), (434, 45820), (553, 35960), (580, 34286), (620, 32074), (632, 31465), (790, 25172), (812, 24490), (868, 22910), (899, 22120), (1015, 19592), (1085, 18328), (1106, 17980), (1160, 17143), (1240, 16037), (1580, 12586), (1624, 12245), (1736, 11455), (1798, 11060), (2030, 9796), (2170, 9164), (2212, 8990), (2291, 8680), (2449, 8120), (2765, 7192), (3160, 6293), (3596, 5530), (4060, 4898), (4340, 4582), (4424, 4495)]