20841240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{577}}^1$

素因数の和:641

約数の個数: 128

約数和(自身を含む): 73244160

約数和(自身を除く): 52402920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 43, 56, 60, 70, 84, 86, 105, 120, 129, 140, 168, 172, 210, 215, 258, 280, 301, 344, 420, 430, 516, 577, 602, 645, 840, 860, 903, 1032, 1154, 1204, 1290, 1505, 1720, 1731, 1806, 2308, 2408, 2580, 2885, 3010, 3462, 3612, 4039, 4515, 4616, 5160, 5770, 6020, 6924, 7224, 8078, 8655, 9030, 11540, 12040, 12117, 13848, 16156, 17310, 18060, 20195, 23080, 24234, 24811, 32312, 34620, 36120, 40390, 48468, 49622, 60585, 69240, 74433, 80780, 96936, 99244, 121170, 124055, 148866, 161560, 173677, 198488, 242340, 248110, 297732, 347354, 372165, 484680, 496220, 521031, 595464, 694708, 744330, 868385, 992440, 1042062, 1389416, 1488660, 1736770, 2084124, 2605155, 2977320, 3473540, 4168248, 5210310, 6947080, 10420620, 20841240]

約数ペア:

[(1, 20841240), (2, 10420620), (3, 6947080), (4, 5210310), (5, 4168248), (6, 3473540), (7, 2977320), (8, 2605155), (10, 2084124), (12, 1736770), (14, 1488660), (15, 1389416), (20, 1042062), (21, 992440), (24, 868385), (28, 744330), (30, 694708), (35, 595464), (40, 521031), (42, 496220), (43, 484680), (56, 372165), (60, 347354), (70, 297732), (84, 248110), (86, 242340), (105, 198488), (120, 173677), (129, 161560), (140, 148866), (168, 124055), (172, 121170), (210, 99244), (215, 96936), (258, 80780), (280, 74433), (301, 69240), (344, 60585), (420, 49622), (430, 48468), (516, 40390), (577, 36120), (602, 34620), (645, 32312), (840, 24811), (860, 24234), (903, 23080), (1032, 20195), (1154, 18060), (1204, 17310), (1290, 16156), (1505, 13848), (1720, 12117), (1731, 12040), (1806, 11540), (2308, 9030), (2408, 8655), (2580, 8078), (2885, 7224), (3010, 6924), (3462, 6020), (3612, 5770), (4039, 5160), (4515, 4616)]