28171220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1663}}^1$

素因数の和:1701

約数の個数: 72

約数和(自身を含む): 74360832

約数和(自身を除く): 46189612

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1540, 1663, 1694, 2420, 3326, 3388, 4235, 6652, 8315, 8470, 11641, 16630, 16940, 18293, 23282, 33260, 36586, 46564, 58205, 73172, 91465, 116410, 128051, 182930, 201223, 232820, 256102, 365860, 402446, 512204, 640255, 804892, 1006115, 1280510, 1408561, 2012230, 2561020, 2817122, 4024460, 5634244, 7042805, 14085610, 28171220]

約数ペア:

[(1, 28171220), (2, 14085610), (4, 7042805), (5, 5634244), (7, 4024460), (10, 2817122), (11, 2561020), (14, 2012230), (20, 1408561), (22, 1280510), (28, 1006115), (35, 804892), (44, 640255), (55, 512204), (70, 402446), (77, 365860), (110, 256102), (121, 232820), (140, 201223), (154, 182930), (220, 128051), (242, 116410), (308, 91465), (385, 73172), (484, 58205), (605, 46564), (770, 36586), (847, 33260), (1210, 23282), (1540, 18293), (1663, 16940), (1694, 16630), (2420, 11641), (3326, 8470), (3388, 8315), (4235, 6652)]