20776980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{191}}^1$

素因数の和:254

約数の個数: 144

約数和(自身を含む): 69866496

約数和(自身を除く): 49089516

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 37, 42, 49, 60, 70, 74, 84, 98, 105, 111, 140, 147, 148, 185, 191, 196, 210, 222, 245, 259, 294, 370, 382, 420, 444, 490, 518, 555, 573, 588, 735, 740, 764, 777, 955, 980, 1036, 1110, 1146, 1295, 1337, 1470, 1554, 1813, 1910, 2220, 2292, 2590, 2674, 2865, 2940, 3108, 3626, 3820, 3885, 4011, 5180, 5348, 5439, 5730, 6685, 7067, 7252, 7770, 8022, 9065, 9359, 10878, 11460, 13370, 14134, 15540, 16044, 18130, 18718, 20055, 21201, 21756, 26740, 27195, 28077, 28268, 35335, 36260, 37436, 40110, 42402, 46795, 49469, 54390, 56154, 70670, 80220, 84804, 93590, 98938, 106005, 108780, 112308, 140385, 141340, 148407, 187180, 197876, 212010, 247345, 280770, 296814, 346283, 424020, 494690, 561540, 593628, 692566, 742035, 989380, 1038849, 1385132, 1484070, 1731415, 2077698, 2968140, 3462830, 4155396, 5194245, 6925660, 10388490, 20776980]

約数ペア:

[(1, 20776980), (2, 10388490), (3, 6925660), (4, 5194245), (5, 4155396), (6, 3462830), (7, 2968140), (10, 2077698), (12, 1731415), (14, 1484070), (15, 1385132), (20, 1038849), (21, 989380), (28, 742035), (30, 692566), (35, 593628), (37, 561540), (42, 494690), (49, 424020), (60, 346283), (70, 296814), (74, 280770), (84, 247345), (98, 212010), (105, 197876), (111, 187180), (140, 148407), (147, 141340), (148, 140385), (185, 112308), (191, 108780), (196, 106005), (210, 98938), (222, 93590), (245, 84804), (259, 80220), (294, 70670), (370, 56154), (382, 54390), (420, 49469), (444, 46795), (490, 42402), (518, 40110), (555, 37436), (573, 36260), (588, 35335), (735, 28268), (740, 28077), (764, 27195), (777, 26740), (955, 21756), (980, 21201), (1036, 20055), (1110, 18718), (1146, 18130), (1295, 16044), (1337, 15540), (1470, 14134), (1554, 13370), (1813, 11460), (1910, 10878), (2220, 9359), (2292, 9065), (2590, 8022), (2674, 7770), (2865, 7252), (2940, 7067), (3108, 6685), (3626, 5730), (3820, 5439), (3885, 5348), (4011, 5180)]