18991140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:561

約数の個数: 96

約数和(自身を含む): 61501440

約数和(自身を除く): 42510300

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 103, 105, 140, 206, 210, 309, 412, 420, 439, 515, 618, 721, 878, 1030, 1236, 1317, 1442, 1545, 1756, 2060, 2163, 2195, 2634, 2884, 3073, 3090, 3605, 4326, 4390, 5268, 6146, 6180, 6585, 7210, 8652, 8780, 9219, 10815, 12292, 13170, 14420, 15365, 18438, 21630, 26340, 30730, 36876, 43260, 45217, 46095, 61460, 90434, 92190, 135651, 180868, 184380, 226085, 271302, 316519, 452170, 542604, 633038, 678255, 904340, 949557, 1266076, 1356510, 1582595, 1899114, 2713020, 3165190, 3798228, 4747785, 6330380, 9495570, 18991140]

約数ペア:

[(1, 18991140), (2, 9495570), (3, 6330380), (4, 4747785), (5, 3798228), (6, 3165190), (7, 2713020), (10, 1899114), (12, 1582595), (14, 1356510), (15, 1266076), (20, 949557), (21, 904340), (28, 678255), (30, 633038), (35, 542604), (42, 452170), (60, 316519), (70, 271302), (84, 226085), (103, 184380), (105, 180868), (140, 135651), (206, 92190), (210, 90434), (309, 61460), (412, 46095), (420, 45217), (439, 43260), (515, 36876), (618, 30730), (721, 26340), (878, 21630), (1030, 18438), (1236, 15365), (1317, 14420), (1442, 13170), (1545, 12292), (1756, 10815), (2060, 9219), (2163, 8780), (2195, 8652), (2634, 7210), (2884, 6585), (3073, 6180), (3090, 6146), (3605, 5268), (4326, 4390)]