20812470

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 128

約数和(自身を含む): 61931520

約数和(自身を除く): 41119050

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 23, 30, 31, 35, 42, 46, 62, 69, 70, 93, 105, 115, 138, 139, 155, 161, 186, 210, 217, 230, 278, 310, 322, 345, 417, 434, 465, 483, 651, 690, 695, 713, 805, 834, 930, 966, 973, 1085, 1302, 1390, 1426, 1610, 1946, 2085, 2139, 2170, 2415, 2919, 3197, 3255, 3565, 4170, 4278, 4309, 4830, 4865, 4991, 5838, 6394, 6510, 7130, 8618, 9591, 9730, 9982, 10695, 12927, 14595, 14973, 15985, 19182, 21390, 21545, 22379, 24955, 25854, 29190, 29946, 30163, 31970, 43090, 44758, 47955, 49910, 60326, 64635, 67137, 74865, 90489, 95910, 99107, 111895, 129270, 134274, 149730, 150815, 180978, 198214, 223790, 297321, 301630, 335685, 452445, 495535, 594642, 671370, 693749, 904890, 991070, 1387498, 1486605, 2081247, 2973210, 3468745, 4162494, 6937490, 10406235, 20812470]

約数ペア:

[(1, 20812470), (2, 10406235), (3, 6937490), (5, 4162494), (6, 3468745), (7, 2973210), (10, 2081247), (14, 1486605), (15, 1387498), (21, 991070), (23, 904890), (30, 693749), (31, 671370), (35, 594642), (42, 495535), (46, 452445), (62, 335685), (69, 301630), (70, 297321), (93, 223790), (105, 198214), (115, 180978), (138, 150815), (139, 149730), (155, 134274), (161, 129270), (186, 111895), (210, 99107), (217, 95910), (230, 90489), (278, 74865), (310, 67137), (322, 64635), (345, 60326), (417, 49910), (434, 47955), (465, 44758), (483, 43090), (651, 31970), (690, 30163), (695, 29946), (713, 29190), (805, 25854), (834, 24955), (930, 22379), (966, 21545), (973, 21390), (1085, 19182), (1302, 15985), (1390, 14973), (1426, 14595), (1610, 12927), (1946, 10695), (2085, 9982), (2139, 9730), (2170, 9591), (2415, 8618), (2919, 7130), (3197, 6510), (3255, 6394), (3565, 5838), (4170, 4991), (4278, 4865), (4309, 4830)]