489020980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:386

約数の個数: 144

約数和(自身を含む): 1279832400

約数和(自身を除く): 790811420

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 149, 170, 196, 197, 238, 245, 298, 340, 394, 476, 490, 595, 596, 745, 788, 833, 980, 985, 1043, 1190, 1379, 1490, 1666, 1970, 2086, 2380, 2533, 2758, 2980, 3332, 3349, 3940, 4165, 4172, 5066, 5215, 5516, 6698, 6895, 7301, 8330, 9653, 10132, 10430, 12665, 13396, 13790, 14602, 16660, 16745, 17731, 19306, 20860, 23443, 25330, 27580, 29204, 29353, 33490, 35462, 36505, 38612, 46886, 48265, 50660, 58706, 66980, 70924, 73010, 88655, 93772, 96530, 117215, 117412, 124117, 146020, 146765, 164101, 177310, 193060, 205471, 234430, 248234, 293530, 328202, 354620, 410942, 468860, 496468, 499001, 587060, 620585, 656404, 820505, 821884, 998002, 1027355, 1241170, 1438297, 1641010, 1996004, 2054710, 2482340, 2495005, 2876594, 3282020, 3493007, 4109420, 4990010, 5753188, 6986014, 7191485, 9980020, 13972028, 14382970, 17465035, 24451049, 28765940, 34930070, 48902098, 69860140, 97804196, 122255245, 244510490, 489020980]

約数ペア:

[(1, 489020980), (2, 244510490), (4, 122255245), (5, 97804196), (7, 69860140), (10, 48902098), (14, 34930070), (17, 28765940), (20, 24451049), (28, 17465035), (34, 14382970), (35, 13972028), (49, 9980020), (68, 7191485), (70, 6986014), (85, 5753188), (98, 4990010), (119, 4109420), (140, 3493007), (149, 3282020), (170, 2876594), (196, 2495005), (197, 2482340), (238, 2054710), (245, 1996004), (298, 1641010), (340, 1438297), (394, 1241170), (476, 1027355), (490, 998002), (595, 821884), (596, 820505), (745, 656404), (788, 620585), (833, 587060), (980, 499001), (985, 496468), (1043, 468860), (1190, 410942), (1379, 354620), (1490, 328202), (1666, 293530), (1970, 248234), (2086, 234430), (2380, 205471), (2533, 193060), (2758, 177310), (2980, 164101), (3332, 146765), (3349, 146020), (3940, 124117), (4165, 117412), (4172, 117215), (5066, 96530), (5215, 93772), (5516, 88655), (6698, 73010), (6895, 70924), (7301, 66980), (8330, 58706), (9653, 50660), (10132, 48265), (10430, 46886), (12665, 38612), (13396, 36505), (13790, 35462), (14602, 33490), (16660, 29353), (16745, 29204), (17731, 27580), (19306, 25330), (20860, 23443)]