20608140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{353}}^1$

素因数の和:511

約数の個数: 96

約数和(自身を含む): 66608640

約数和(自身を除く): 46000500

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 139, 140, 210, 278, 353, 417, 420, 556, 695, 706, 834, 973, 1059, 1390, 1412, 1668, 1765, 1946, 2085, 2118, 2471, 2780, 2919, 3530, 3892, 4170, 4236, 4865, 4942, 5295, 5838, 7060, 7413, 8340, 9730, 9884, 10590, 11676, 12355, 14595, 14826, 19460, 21180, 24710, 29190, 29652, 37065, 49067, 49420, 58380, 74130, 98134, 147201, 148260, 196268, 245335, 294402, 343469, 490670, 588804, 686938, 736005, 981340, 1030407, 1373876, 1472010, 1717345, 2060814, 2944020, 3434690, 4121628, 5152035, 6869380, 10304070, 20608140]

約数ペア:

[(1, 20608140), (2, 10304070), (3, 6869380), (4, 5152035), (5, 4121628), (6, 3434690), (7, 2944020), (10, 2060814), (12, 1717345), (14, 1472010), (15, 1373876), (20, 1030407), (21, 981340), (28, 736005), (30, 686938), (35, 588804), (42, 490670), (60, 343469), (70, 294402), (84, 245335), (105, 196268), (139, 148260), (140, 147201), (210, 98134), (278, 74130), (353, 58380), (417, 49420), (420, 49067), (556, 37065), (695, 29652), (706, 29190), (834, 24710), (973, 21180), (1059, 19460), (1390, 14826), (1412, 14595), (1668, 12355), (1765, 11676), (1946, 10590), (2085, 9884), (2118, 9730), (2471, 8340), (2780, 7413), (2919, 7060), (3530, 5838), (3892, 5295), (4170, 4942), (4236, 4865)]