21127120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1217}}^1$

素因数の和:1268

約数の個数: 80

約数和(自身を含む): 57996288

約数和(自身を除く): 36869168

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1217, 1240, 1736, 2170, 2434, 2480, 3472, 4340, 4868, 6085, 8519, 8680, 9736, 12170, 17038, 17360, 19472, 24340, 34076, 37727, 42595, 48680, 68152, 75454, 85190, 97360, 136304, 150908, 170380, 188635, 264089, 301816, 340760, 377270, 528178, 603632, 681520, 754540, 1056356, 1320445, 1509080, 2112712, 2640890, 3018160, 4225424, 5281780, 10563560, 21127120]

約数ペア:

[(1, 21127120), (2, 10563560), (4, 5281780), (5, 4225424), (7, 3018160), (8, 2640890), (10, 2112712), (14, 1509080), (16, 1320445), (20, 1056356), (28, 754540), (31, 681520), (35, 603632), (40, 528178), (56, 377270), (62, 340760), (70, 301816), (80, 264089), (112, 188635), (124, 170380), (140, 150908), (155, 136304), (217, 97360), (248, 85190), (280, 75454), (310, 68152), (434, 48680), (496, 42595), (560, 37727), (620, 34076), (868, 24340), (1085, 19472), (1217, 17360), (1240, 17038), (1736, 12170), (2170, 9736), (2434, 8680), (2480, 8519), (3472, 6085), (4340, 4868)]