28118860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2$

素因数の和:108

約数の個数: 144

約数和(自身を含む): 80075520

約数和(自身を除く): 51956660

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 19, 20, 22, 28, 31, 35, 38, 44, 55, 62, 70, 76, 77, 95, 110, 124, 133, 140, 154, 155, 190, 209, 217, 220, 266, 308, 310, 341, 380, 385, 418, 434, 532, 589, 620, 665, 682, 770, 836, 868, 961, 1045, 1085, 1178, 1330, 1364, 1463, 1540, 1705, 1922, 2090, 2170, 2356, 2387, 2660, 2926, 2945, 3410, 3844, 4123, 4180, 4340, 4774, 4805, 5852, 5890, 6479, 6727, 6820, 7315, 8246, 9548, 9610, 10571, 11780, 11935, 12958, 13454, 14630, 16492, 18259, 19220, 20615, 21142, 23870, 25916, 26908, 29260, 32395, 33635, 36518, 41230, 42284, 45353, 47740, 52855, 64790, 67270, 73036, 73997, 82460, 90706, 91295, 105710, 127813, 129580, 134540, 147994, 181412, 182590, 200849, 211420, 226765, 255626, 295988, 365180, 369985, 401698, 453530, 511252, 639065, 739970, 803396, 907060, 1004245, 1278130, 1405943, 1479940, 2008490, 2556260, 2811886, 4016980, 5623772, 7029715, 14059430, 28118860]

約数ペア:

[(1, 28118860), (2, 14059430), (4, 7029715), (5, 5623772), (7, 4016980), (10, 2811886), (11, 2556260), (14, 2008490), (19, 1479940), (20, 1405943), (22, 1278130), (28, 1004245), (31, 907060), (35, 803396), (38, 739970), (44, 639065), (55, 511252), (62, 453530), (70, 401698), (76, 369985), (77, 365180), (95, 295988), (110, 255626), (124, 226765), (133, 211420), (140, 200849), (154, 182590), (155, 181412), (190, 147994), (209, 134540), (217, 129580), (220, 127813), (266, 105710), (308, 91295), (310, 90706), (341, 82460), (380, 73997), (385, 73036), (418, 67270), (434, 64790), (532, 52855), (589, 47740), (620, 45353), (665, 42284), (682, 41230), (770, 36518), (836, 33635), (868, 32395), (961, 29260), (1045, 26908), (1085, 25916), (1178, 23870), (1330, 21142), (1364, 20615), (1463, 19220), (1540, 18259), (1705, 16492), (1922, 14630), (2090, 13454), (2170, 12958), (2356, 11935), (2387, 11780), (2660, 10571), (2926, 9610), (2945, 9548), (3410, 8246), (3844, 7315), (4123, 6820), (4180, 6727), (4340, 6479), (4774, 5890), (4805, 5852)]