20398770

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:317

約数の個数: 128

約数和(自身を含む): 63866880

約数和(自身を除く): 43468110

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 43, 45, 54, 63, 70, 86, 90, 105, 126, 129, 135, 189, 210, 215, 251, 258, 270, 301, 315, 378, 387, 430, 502, 602, 630, 645, 753, 774, 903, 945, 1161, 1255, 1290, 1505, 1506, 1757, 1806, 1890, 1935, 2259, 2322, 2510, 2709, 3010, 3514, 3765, 3870, 4515, 4518, 5271, 5418, 5805, 6777, 7530, 8127, 8785, 9030, 10542, 10793, 11295, 11610, 13545, 13554, 15813, 16254, 17570, 21586, 22590, 26355, 27090, 31626, 32379, 33885, 40635, 47439, 52710, 53965, 64758, 67770, 75551, 79065, 81270, 94878, 97137, 107930, 151102, 158130, 161895, 194274, 226653, 237195, 291411, 323790, 377755, 453306, 474390, 485685, 582822, 679959, 755510, 971370, 1133265, 1359918, 1457055, 2039877, 2266530, 2914110, 3399795, 4079754, 6799590, 10199385, 20398770]

約数ペア:

[(1, 20398770), (2, 10199385), (3, 6799590), (5, 4079754), (6, 3399795), (7, 2914110), (9, 2266530), (10, 2039877), (14, 1457055), (15, 1359918), (18, 1133265), (21, 971370), (27, 755510), (30, 679959), (35, 582822), (42, 485685), (43, 474390), (45, 453306), (54, 377755), (63, 323790), (70, 291411), (86, 237195), (90, 226653), (105, 194274), (126, 161895), (129, 158130), (135, 151102), (189, 107930), (210, 97137), (215, 94878), (251, 81270), (258, 79065), (270, 75551), (301, 67770), (315, 64758), (378, 53965), (387, 52710), (430, 47439), (502, 40635), (602, 33885), (630, 32379), (645, 31626), (753, 27090), (774, 26355), (903, 22590), (945, 21586), (1161, 17570), (1255, 16254), (1290, 15813), (1505, 13554), (1506, 13545), (1757, 11610), (1806, 11295), (1890, 10793), (1935, 10542), (2259, 9030), (2322, 8785), (2510, 8127), (2709, 7530), (3010, 6777), (3514, 5805), (3765, 5418), (3870, 5271), (4515, 4518)]