20971720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{619}}^1$

素因数の和:659

約数の個数: 96

約数和(自身を含む): 59371200

約数和(自身を除く): 38399480

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 121, 140, 154, 220, 242, 280, 308, 385, 440, 484, 605, 616, 619, 770, 847, 968, 1210, 1238, 1540, 1694, 2420, 2476, 3080, 3095, 3388, 4235, 4333, 4840, 4952, 6190, 6776, 6809, 8470, 8666, 12380, 13618, 16940, 17332, 21665, 24760, 27236, 33880, 34045, 34664, 43330, 47663, 54472, 68090, 74899, 86660, 95326, 136180, 149798, 173320, 190652, 238315, 272360, 299596, 374495, 381304, 476630, 524293, 599192, 748990, 953260, 1048586, 1497980, 1906520, 2097172, 2621465, 2995960, 4194344, 5242930, 10485860, 20971720]

約数ペア:

[(1, 20971720), (2, 10485860), (4, 5242930), (5, 4194344), (7, 2995960), (8, 2621465), (10, 2097172), (11, 1906520), (14, 1497980), (20, 1048586), (22, 953260), (28, 748990), (35, 599192), (40, 524293), (44, 476630), (55, 381304), (56, 374495), (70, 299596), (77, 272360), (88, 238315), (110, 190652), (121, 173320), (140, 149798), (154, 136180), (220, 95326), (242, 86660), (280, 74899), (308, 68090), (385, 54472), (440, 47663), (484, 43330), (605, 34664), (616, 34045), (619, 33880), (770, 27236), (847, 24760), (968, 21665), (1210, 17332), (1238, 16940), (1540, 13618), (1694, 12380), (2420, 8666), (2476, 8470), (3080, 6809), (3095, 6776), (3388, 6190), (4235, 4952), (4333, 4840)]