21028920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:293

約数の個数: 128

約数和(自身を含む): 69984000

約数和(自身を除く): 48955080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 89, 110, 120, 132, 165, 178, 179, 220, 264, 267, 330, 356, 358, 440, 445, 534, 537, 660, 712, 716, 890, 895, 979, 1068, 1074, 1320, 1335, 1432, 1780, 1790, 1958, 1969, 2136, 2148, 2670, 2685, 2937, 3560, 3580, 3916, 3938, 4296, 4895, 5340, 5370, 5874, 5907, 7160, 7832, 7876, 9790, 9845, 10680, 10740, 11748, 11814, 14685, 15752, 15931, 19580, 19690, 21480, 23496, 23628, 29370, 29535, 31862, 39160, 39380, 47256, 47793, 58740, 59070, 63724, 78760, 79655, 95586, 117480, 118140, 127448, 159310, 175241, 191172, 236280, 238965, 318620, 350482, 382344, 477930, 525723, 637240, 700964, 876205, 955860, 1051446, 1401928, 1752410, 1911720, 2102892, 2628615, 3504820, 4205784, 5257230, 7009640, 10514460, 21028920]

約数ペア:

[(1, 21028920), (2, 10514460), (3, 7009640), (4, 5257230), (5, 4205784), (6, 3504820), (8, 2628615), (10, 2102892), (11, 1911720), (12, 1752410), (15, 1401928), (20, 1051446), (22, 955860), (24, 876205), (30, 700964), (33, 637240), (40, 525723), (44, 477930), (55, 382344), (60, 350482), (66, 318620), (88, 238965), (89, 236280), (110, 191172), (120, 175241), (132, 159310), (165, 127448), (178, 118140), (179, 117480), (220, 95586), (264, 79655), (267, 78760), (330, 63724), (356, 59070), (358, 58740), (440, 47793), (445, 47256), (534, 39380), (537, 39160), (660, 31862), (712, 29535), (716, 29370), (890, 23628), (895, 23496), (979, 21480), (1068, 19690), (1074, 19580), (1320, 15931), (1335, 15752), (1432, 14685), (1780, 11814), (1790, 11748), (1958, 10740), (1969, 10680), (2136, 9845), (2148, 9790), (2670, 7876), (2685, 7832), (2937, 7160), (3560, 5907), (3580, 5874), (3916, 5370), (3938, 5340), (4296, 4895)]