20352780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:608

約数の個数: 144

約数和(自身を含む): 73120320

約数和(自身を除く): 52767540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 29, 30, 35, 36, 42, 45, 58, 60, 63, 70, 84, 87, 90, 105, 116, 126, 140, 145, 174, 180, 203, 210, 252, 261, 290, 315, 348, 406, 420, 435, 522, 557, 580, 609, 630, 812, 870, 1015, 1044, 1114, 1218, 1260, 1305, 1671, 1740, 1827, 2030, 2228, 2436, 2610, 2785, 3045, 3342, 3654, 3899, 4060, 5013, 5220, 5570, 6090, 6684, 7308, 7798, 8355, 9135, 10026, 11140, 11697, 12180, 15596, 16153, 16710, 18270, 19495, 20052, 23394, 25065, 32306, 33420, 35091, 36540, 38990, 46788, 48459, 50130, 58485, 64612, 70182, 77980, 80765, 96918, 100260, 113071, 116970, 140364, 145377, 161530, 175455, 193836, 226142, 233940, 242295, 290754, 323060, 339213, 350910, 452284, 484590, 565355, 581508, 678426, 701820, 726885, 969180, 1017639, 1130710, 1356852, 1453770, 1696065, 2035278, 2261420, 2907540, 3392130, 4070556, 5088195, 6784260, 10176390, 20352780]

約数ペア:

[(1, 20352780), (2, 10176390), (3, 6784260), (4, 5088195), (5, 4070556), (6, 3392130), (7, 2907540), (9, 2261420), (10, 2035278), (12, 1696065), (14, 1453770), (15, 1356852), (18, 1130710), (20, 1017639), (21, 969180), (28, 726885), (29, 701820), (30, 678426), (35, 581508), (36, 565355), (42, 484590), (45, 452284), (58, 350910), (60, 339213), (63, 323060), (70, 290754), (84, 242295), (87, 233940), (90, 226142), (105, 193836), (116, 175455), (126, 161530), (140, 145377), (145, 140364), (174, 116970), (180, 113071), (203, 100260), (210, 96918), (252, 80765), (261, 77980), (290, 70182), (315, 64612), (348, 58485), (406, 50130), (420, 48459), (435, 46788), (522, 38990), (557, 36540), (580, 35091), (609, 33420), (630, 32306), (812, 25065), (870, 23394), (1015, 20052), (1044, 19495), (1114, 18270), (1218, 16710), (1260, 16153), (1305, 15596), (1671, 12180), (1740, 11697), (1827, 11140), (2030, 10026), (2228, 9135), (2436, 8355), (2610, 7798), (2785, 7308), (3045, 6684), (3342, 6090), (3654, 5570), (3899, 5220), (4060, 5013)]